Most of these are not in stock and are discontinued.

10-17-2020

Find the part number below and
Click here to check the number

If it is not found. We don't have it and
have no plans at this time to make them again.


For .20 to .61 engines! and Larger,

And the economically priced Scotsman Mufflers!
also our LARGER Scotsman racing Mufflers (.91-160s)!

Also see Control-Line & Helicopters Mufflers!

  • Value priced
  • One piece construction
  • Will not unbolt or come apart
  • Lightweight: up to 50% lighter than stock mufflers
  • MACS design, less likely to be damaged in crash
  • Ready for MACS Pumpless Smoke System (order #9521)

If you can't find your motor in the first muffler listings CLICK on one of the red adapter plates for the appropriate size Adapter Mufflers you are looking for!
(Only Adapter Mufflers require Adapter Plates!)

Size Engines Fitted Price Stock Number
.21-.36 .20 Size Adapter Muffler
(requires a .20 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 48.35mm/1.900") 		  MAC6200
O.S..25 FP & LA
Super TigerG .34 Aero (bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 32.11mm/1.264") 		MAC6300
O.S. .21-.32, .25FX, .32SX, .25-.36AX
(does not fit the OS.25 FP or LA see #6300)
(also does not fit the ASP.28 / c-t-c 34mm?)
Evolution .36 NT
Enya .21 CX, SS, 35X-TN & 35XS
GMS 2000 .25-.32 ABC
Irvine .25 & .36 (bolt through)
Jett .25-.35
Magnum XLS.25 & .25 Pro
(I'm told this muffler wont fit the Magnum .28)
Thunder Tiger .25 & .36 Pro
Webra .25-.36 Speed
MDS .28-.38 FS Pro
(screws 5/40 x 1 1/4" socket head)
(center to center = 35.05mm/1.380") 		MAC6340

w/screws + pf
1.8 oz
approximately
7 1/8" long
.40-.50 .40 Size Adapter Muffler
(requires a .40 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 48.35mm/1.900") 		  MAC6400
MULTI-ENGINE STRAP-ON FITS:
O.S. .30-.35-.40 RC (old strap-on series)
ENYA .29-.35-.40-.45 (old strap-on series)
K&B .40 (old strap-on)
(K&B .40 also requires plug #9522 below)*
(See photos of this muffler #6520) 		MAC6520
OS.40-.46 FX,SF, .46-.55 AX, .50 SX
-( also see the new .55 AX muffler #6720 )-
Evolution .40NT & .46NT-NX & Trainer A
ASP .46, GMS 2000 .40-.47
Irvine .40 & .46 (bolt through)
Magnum XLS.46
MECOA .40-.46, Royal .46
MDS .48 FS Pro
Rossi .45 (new)
Thunder Tiger .40 & .46 Pro
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6590

w/screws + pf
2.2 oz
approximately
8" long
Super Tiger S .40-.45-.51(&G)(7)
Como .40-.51 (bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 38.61mm/1.520") 		MAC6620
O.S. .35-.40 FP, O.S. .40-.46 LA
Enya 40XZ-TN & 40XZS
Evolution .40NX (bolt through)
K&B .48, Jett .40L
Magnum .40 GP & .44 GP
Thunder Tiger .42-.46 GP
Webra .40 RC (non Speed)
(screws 4/40 x 1 1/4" fillister head)
(center to center = 35.05mm/1.380") 		MAC6650
.55-.75 .60 size Adapter Muffler
(requires a .60 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 50.90mm/2.000") 		  MAC6700
O.S. .46-.55 AX, .50 SX (bolt through)
-(this muffler is a better volume match for the
.55AX, .50SX and the .46AX than the #6590)-
O.S..60 GGT(gas) - Evolution .52-.60NX &
10cc GX(gas-small block) - ASP .52
(MACS Product Does not guarantee this
muffler when it is used on the OS.60 GGT (gas),
Evo.10cc GX(gas) or other gas motors)
Magnum .52 XLS
Rossi .53 (new)
Y.S. .56 SR (new)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6720
O.S. .60 FP-LA, .61 SF-FX,.65,.75 LA-AX
Evolution .61NT, .61NX, GX10(gas-old large
block)(not the Evolution .60NX see #6720)
(MACS Product Does not guarantee this
muffler when it is used on the Evo.10cc
GX(gas) or OS GGT10 or other gas motors)
Irvine .61 (NEW - bolt through)
Jett .67L -.76L (not the .60L)
Magnum XLS.61 & .61 Pro
MDS .68-.78 FS Pro
Rossi .60-.65 (new)
Thunder Tiger .61 GP, .61 Pro (bolt through)
Webra .61-.75 P5-H
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656") 		MAC6860

w/screws + pf
2.8 oz
approximately
8 1/2" long
Super Tiger G .60, S .61-.75 (7)
Jett .65 (not the .60L, .67L or .76L)
Como .61-.75 (bolt through)
(screws 6/32 x 1 1/4" fillister head-n/w)
(center to center = 47.12mm/1.855") 		MAC6900
Super Tiger S .61K (7)(bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 47.14mm/1.856") 		MAC6920
* Engine plugs - for use with strap-on muffler #6520 on K&B .40 old strap-on motor - Set of 2   MAC9522
Please note we make some of the mufflers, above, in different configurations,
LONG - 15° away from 90° instead of just 7.5° like the standards.
Marine & Under Wing - 7.5° away from 90° and 15° twisted -
(down for under a mid to high wing and up for marine, reversed motor!),
(These two types for mufflers dont come with a pressure fitting, to have
one included see the last listting of the SCOTSMAN Mufflers (!)P/F )
for more info call us.
(7) Super Tiger! Motors usually don't like a large amount of back pressure, and you
may find our mufflers need to have the two holes, in either end, of the exhaust stinger
tube, might need to be enlarged. Be sure you use a long enough drill or reamer.
(8) The Super Tiger .60 bolt-through muffler doesn't come with washers, because the
split lock washer can get stuck in the screw counter sink hole.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Larger Mufflers

Size Engines Fitted Price Stock Number
.90-1.20 .90 size Adapter Muffler
(requires a .90 size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 50.90mm/2.000") 		79.95 MAC7010
Super Tiger G .90
Super Tiger S .91
Jett .90 - 1.20 (bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 47.12mm/1.855") 		MAC6970
O.S. .91 FX,SX,SZ&.75&.95 AX, GT&GGT 15
ASP .91
Evolution .91NX & 15cc GX(gas)
(MACS Product Does not guarantee this
muffler when it is used on the Evo.15cc
GX(gas) or OS GT15 or other gas motors)
Magnum .91 Pro
Webra .91 P5 (bolt through)
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656") 		MAC6980
w/screws + pf
3.6 oz
approximately
8 1/2" long
O.S. 1.20 AX
(screws 8/32 x 1 3/4" fillister head)
(center to center = 48.01mm/1.890")
(also see scotsman) 		MAC6990
1.00-2.60 1.20 size Adapter Muffler
(requires adapter plate) 		98.95
(5)		 n/a
Evolution 1.00 NT & 1.20 NX (bolt-on)
ASP 120 (S)
Magnum XL 120
(screws 4mm x 12mm socket head)
(center to center = 42.37mm/1.668") 		MAC7070
(5)
Webra 1.20
Bully 1.2 PR
GMS 2000 120
Mark 135
MDS 148
MVVS 215
UAV 120
(screws 4mm x 12mm socket head)
(center to center = 40.39mm/1.590") 		MAC7130
Zeonah G 23-26
(screws 5mm x 16mm socket head)
(center to center = 34.29mm/1.350") 		(5)
O.S. 1.60 FX (also see scotsman)
(also fits, but not designed for-
O.S. 3500 & Super Tiger S 4500)
(screws 5mm x 16mm socket head)
(center to center = 44.00mm/1.732") 		MAC7310
(5.) In Testing - we are testing this item, they may be available,
but we reserve the right to make changes without notification.
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Scotsman Mufflers
2015
Special limited time offer $28.95 for the .40 size Scotsman mufflers


These Muffler are similar to our standard Black Mufflers
But they don't have a restriction baffle tube inside the stinger end,
no pressure fitting(!), bare aluminum, and .40 size weigh about 1.8oz
(Please NOTE! These mufflers are a little louder then our Black Mufflers!)

Size Engines Fitted Price Stock
Number
.40-.50 .40 Size Adapter Muffler (1)
(requires a .40 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 48.35mm/1.900") 		28.95 MAC6404
MULTI-ENGINE STRAP-ON FITS:
K&B .40 (old strap-on)(2)
(K&B .40 also requires plug #9522 above)* 		MAC6524
OS.40-.46 FX,SF, .46-.55 AX, .50 SX(2)
Thunder Tiger .40-.46 Pro (bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6594
1.8 oz
SuperTigerS.40-.51(&G)(2)(bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 38.61mm/1.520")
MAC6624
O.S. .35-.40 FP, O.S. .40-.46 LA(2)
(screws 4/40 x 1 1/2" fillister head)
(center to center = 35.05mm/1.380") 		MAC6654
.55-.75 .60 size Adapter Muffler (1)
(requires a .60 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 50.90mm/2.000") 		34.95
(5)		 MAC6704
O.S. .55 AX, .50 SX(2)(bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6724
O.S. .60-.65 SF,FX,AX,FP,LA,&.75 AX
Evolution .61NT & .61NX (bolt through)
Thunder Tiger .61 GP, .61 Pro(2)
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656") 		MAC6864
2.4 oz
SuperTigerG.60,S.61-.75(2)(bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 47.12mm/1.855") 		MAC6904
Super Tiger S .61K (bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 47.14mm/1.856") 		MAC6924
.90-160
(6)		 O.S. .91 FX,.95 AX (2)(6)
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656")
(this is a custom racing scotsman) 		34.95
(5)		 MAC6864
Super Tiger G .90 (2)(6)
Super Tiger S .91 (bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 47.12mm/1.855")
(this is a custom racing scotsman) 		MAC6904
O.S. 1.20 AX (6)
(screws 8/32 x 1 3/4" fillister head)
(center to center = 48.01mm/1.890")
(this is a custom racing scotsman) 		38.95
(5)
 MAC6996
O.S. 160 (2)(6)
(screws 5mm x 16mm socket head)
(center to center = 44.00mm/1.732")
(this is a custom racing scotsman) 		MAC7316
(!) P/F PLEASE note! These scotsman come in bare aluminum
and without pressure fittings these items must be added
and are then no longer standard off-the-shelf items. 		- -
drill and tap 6/32 pressure fitting hole(3) 3.50 MAC9012
6/32 thread pressure fitting - installed(3-#9012)or not 5.25 MAC9011
drill and tap 8/32 pressure fitting hole(3) 3.50 MAC9022
8/32 thread pressure fitting - installed(3-#9022)or not 5.25 MAC9021
finish NEW! bead blast a Scotsman or control-line muffler(3) 10.95 MAC9003
buff and hand polish a Scotsman or c/l muffler(3) 10.95 MAC9004
(1.) The .40 size Adapter Mufflers meet the 1.8oz weight by them selves,
but with the adapter plate they do weigh more.
(2.) We only list the main motors these mufflers were designed for,
for a more complete list, see the main black muffler listing above.
(3.) These services must be purchased at the same time as the Scotsman Muffler.
4. These are basic, unfinnished mufflers, ready to be used as they are.

(5.) In Testing - we are testing these items, they may be available,
but we reserve the right to make changes without notification.
(6.) These mufflers use the same barrels as the above .60 size scotsman mufflers
and they have an exhaust hole of about .280" which may or may not be big enough
for these motors in a racing application. They can be easley enlarged.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Control-Line Mufflers


These Muffler are similar to our standard mufflers
But they don't have a restriction baffle tube inside the stinger end,
they are bare aluminum like the Scotsman, and they weigh less then 1.5oz

Engines Fitted Price 82° Stock Number 90° Stock Number
.40 Size Adapter Control-Line Muffler(1)
(requires a .40 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 48.35mm/1.900")
(use our adapter plates or make your own) 		30.95 MAC6406 MAC6407
Super Tiger .51 Control-Line(2) +
(screws 6/32 x 1 1/2" fillister head)
(center to center = 38.61mm/1.520") 		MAC6626 MAC6627
O.S. .40-.46 FP-LA Control-Line(2) +
(screws 5/40 x 1 1/4" socket head)
(center to center = 35.05mm/1.380") 		MAC6656 MAC6657
(1.) The Adapter Mufflers meet the 1.5oz weight by them selves,
but with the adapter plate they do weigh more.
(2.) We only list the main motors these mufflers were designed for,
not all the motors they will fit.
3. These are basic raw mufflers, ready to be used as they are
or modify as you wish.
P.S. For those who are looking for wing mufflers, we do have an association
with a Mr. Brian Moore who is making a very nice wing muffler - call!
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

90° Helicopter Mufflers

Engines Fitted Price Stock Number
.20 Size Adapter Helicopter Muffler
(requires a .20 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 48.35mm/1.900") 		41.95 MAC6203
O.S. .21-.32, .25FX, .32SX, .25-.36AX
Evolution .36 NT
Enya .21 CX, SS, 35X-TN & 35XS
Irvine .25 & .36 (bolt through)
Jett .25-.35
Magnum .25 Pro
Thunder Tiger .25 & .36 Pro
Webra .25-.36 Speed
MDS .28-.38 FS Pro
(screws 5/40 x 1 1/4" socket head)
(center to center = 35.05mm/1.380") 		MAC6343
.40 Size Adapter Helicopter Muffler
(requires a .40 Size adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 48.35mm/1.900") 		47.95 MAC6403
OS.40-.46 FX & H,SF, .46-.55 AX, .50 SX
-(for the new .55 HZ helo-muffler see #6723 )-
Evolution .40NT & .46NT & Trainer A
ASP .46, GMS 2000 .40-.47
Irvine .40 & .46 (bolt through)
MECOA .40-.46, Royal .46
MDS .48 FS Pro (bolt through)
Rossi .45 (new)
Thunder Tiger .40 & .46 Pro
Y.S. .56 SR (new-bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6593
.60 Size Adapter Helicopter Muffler
(requires adapter plate)
(screws 6/32 x .625" socket head)
(center to center = 50.90mm/2.000") 		59.95 MAC6703
O.S. .50-.55 AX & .55 HZ
ASP .52 Evolution .52-.60NX
Rossi .53 (new)(bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6723
O.S. .60-.61 FP, LA, SF, FX, LX-H & SX-H & .75 AX
Evolution .61NT & .61NX
Irvine .61 (bolt through)
Jett .67L -.76L (not the .60L)
Magnum .61 Pro
MDS .68-.78 FS Pro
Rossi .60-.65 (new)
Thunder Tiger .61 GP, .61 Pro (bolt through)
Webra .61-.75 P5-H
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656") 		MAC6863
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -




Muffler Adapter Plates

.20 Size Adapter Plates
(use with #6200 adapter mufflers)
(Only Adapter Mufflers require Adapter Plates)
Price - 9.95
MVVS 3.5
MDS .25 FS
(screws 2.5mm x 12mm socket head)
(center to center = 24.94mm/.982") 		MAC6268
Irvine .20 (older - bolt-on)
(screws 4/40 x 1/2" socket head)
(center to center = 25.40mm/1.000") 		MAC6278
O.S. .25 FP & LA
MAG .21 GP
STG.34 (bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 32.11mm/1.264") 		MAC6308
Norvel .25
OPS 3.5
(screws 5/40 x 1/2" socket head)
(center to center = 26.97mm/1.062") 		MAC6318
O.S. .21-.32 FS & SX
O.S. .21-.32, .25 FX, .32 SX
Thunder Tiger .25 & .36 Pro
Enya .21 CX, SS, 35X-TN & 35XS
Enya MT
Irvine.25 & .36 (bolt through)
Jett .25-.35
Magnum .25 Pro
MDS .28-.38 FS Pro
Webra .28 Speed (bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 35.05mm/1.380") 		MAC6348
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

.40 Size Adapter Plates
(use with #6400 adapter mufflers)
(Only Adapter Mufflers require Adapter Plates)
Price - 9.95
MACENYA .40-.45 X & CX (bolt-on)
OPS .40
(screws 3.5mm x 12mm socket head)
(center to center = 29.97mm/1.180") 		MAC6428
ENYA .40 SS
(screws 5/40 x 1 1/4" socket head)
(center to center = 42.16mm/1.660") 		MAC6438
MDS .40 FS (older - bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 31.19mm/1.228") 		MAC6488
Jett .40-.50 (not the 40L)
H.B. .40 (bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 38.10mm/1.500") 		MAC6498
MDS .46 FS (older - bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 38.10mm/1.500") 		MAC6518
K&B .40(bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 31.75mm/1.250") 		MAC6538
K&B .45 Sportster & .48(bolt through)
(screws 6/32 x 1 1/2" socket head)
(center to center = 35.15mm/1.384") 		MAC6548
MVVS .40 (bolt-on)
(screws 3mm x 12mm socket head)
(center to center = 28.60mm/1.126") 		MAC6558
O.S. .40 FSR
ASP .40
Irvine .40 (older - bolt-on)
Royal .40-.45 (bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 27.94mm/1.100") 		MAC6588
O.S. .40-.46 FX, .40-.46 SF
Thundertiger .40-.46 Pro
Irvine .40-.46 (bolt through)
MDS .48 (bolt through)
Rossi .45-.53 (new)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6598
Rossi .40-.45 (bolt-on)
(Doesn't fit the new Bolt-Through motors)
(screws 3.5mm x 12mm socket head)
(center to center = 31.75mm/1.250") 		MAC6608
Super Tiger G. .40-.45 (bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 38.61mm/1.520") 		MAC6628
Super Tiger .40-.46 K (bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 38.61mm/1.520") 		MAC6638
Webra .40&.50 Speed (bolt through)
(screws 4/40 x 1 1/2" fillister head)
(center to center = 39.12mm/1.540") 		MAC6648
O.S. .35-.40 FP, .40-.46 LA
Enya 40XZ-TN & 40XZS
Evolution .40NX
Jett .40L
Magnum .40-.46 GP
Thundertiger .40-.46 GP
(screws 4/40 x 1 1/2" fillister head)
(center to center = 35.05mm/1.380") 		MAC6658
Y.S. .45
(screws 3.5mm x 12mm socket head)
(center to center = 31.19mm/1.228") 		MAC6678
Price - 22.95
Picco .40-.45
(screws 3mm x 12mm socket head)
(center to center = 27.69mm/1.090") 		MAC6618
(Picco .40 & .60 Adapter Plates are custom milled to fit this system)
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

.60 Size Adapter Plates
(use with #6700 adapter mufflers)
(Only Adapter Mufflers require Adapter Plates)
Price -10.95
Enya .45-.50SS &.50CX &.61CX TN & CXS PRO
(screws 5/40 x 1 1/2" socket head)
(center to center = 42.16mm/1.660") 		MAC6718
O.S. .50 SX &.55 AX (bolt through)
(see #6720 above for all the motors this will fit)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460") 		MAC6728
Rossi .53 P5 (bolt-on)
(Doesn't fit the new Bolt-Through motors)
(screws 3.5mm x 12mm socket head)
(center to center = 31.75mm/1.250") 		MAC6738
Super Tiger .56 (light case)(Strap-On System)
(exhaust surface counter sink hole)
(1.410"/35.81mm-w x .380"/9.65mm-h)
(this hole has half circle ends)
(this hole also has relief for the cylinder) 		n/a
Webra .55 p5-GT (bolt through)
(screws 4/40 x 1 1/2" fillister head)
(center to center = 39.12mm/1.540") 		MAC6748
Enya .60 III (old Strap-On System)
(exhaust surface counter sink hole)
(1.574"/39.97mm-w x .466"/11.84mm-h)
(this hole has squarish ends - not half circles) 		MAC6755
Irvine .61 (older - bolt-on)
Fox .60-.74
(screws 6/32 x 1/2" socket head)
(center to center = 34.80mm/1.370") 		MAC6758
Webra .61 Speed (old strap-on)
HP .61 OLD (Strap-On System)
(exhaust surface counter sink hole)
(1.660"/42.17mm-w x .445"/11.32mm-h)
(this hole has half circle ends)
(this hole also has relief for the cylinder) 		MAC6768
K&B .61
H.B. .61
Jett .60 L
Webra .61 BH (old - bolt through)
(screws 5/40 x 1 1/2" socket head-n/w)
(center to center = 38.10mm/1.500") 		MAC6778
K&B .65 Sportster
(screws 6/32 x 1 1/2" socket head)
(center to center = 38.10mm/1.500") 		MAC6788
Y.S. .61 Long Stroke
Kraft .61
RJL .61
(screws 3.5mm x 12mm socket head)
(center to center = 32.21mm/1.268") 		MAC6808
Moki .61
(screws 4mm x 12mm socket head)
(center to center = 28.24mm/1.112") 		MAC6818
MDS .58 FS PRO
(screws 5/40 x 1 1/4" socket head)
(center to center = 37.08mm/1.460") 		MAC6828
MDS .61 FS (older - bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 37.08mm/1.460") 		MAC6838
O.S. .61 GR Black/Gold Head (Strap-On System)
(exhaust surface counter sink hole)
(1.584"/40.24mm-w x .440"/11.17mm-h)
(this hole has half circle ends) 		MAC6857
O.S. .50-.61 FSR
ASP .61
Enya .61X
MVVS .61
Webra .61-.70 F (bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 33.91mm/1.335") 		MAC6858
O.S. .60 FP & LA, .61.75 FX AX
Irvine .61 (bolt through)
Jett .67L -.76L (not the .60L or the .65)
MDS .68 (bolt through)
Rossi .60-.65 (new)
Thundertiger .61 GP & Pro
Webra .61-.75 P5-H
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656") 		MAC6868
Rossi .61 (4mm screws -older- bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 36.12mm/1.422")
(Doesn't fit the new Bolt-Through motors) 		MAC6878
Rossi (old) .60-.61 (3.5mm screws -older- bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 36.12mm/1.422")
(Doesn't fit the new Bolt-Through motors) 		call
Tower .61-.75 (bolt-on)
GMS 2000 .61 ringed & .76A
(screws 4mm x 12mm socket head)
(center to center = 40.13mm/1.580") 		MAC6898
Super Tiger G.60 (Strap-On System)
(exhaust surface counter sink hole)
(1.592"/40.44mm-w x .484"/12.30mm-h)
(this exhaust port has squarish ends-not half circles)
The motor had screw mounting holes,but the screw
bosses were machined off both sides of the case 		MAC6917
Super Tiger X .61
Moki 8.5 (bolt-on)
(screws 3mm x 12mm socket head)
(center to center = 29.21mm/1.150") 		MAC6918
Y.S. .60 (standard stroke)
(screws 4mm x 12mm socket head)
(center to center = 32.21mm/1.268") 		MAC6938
Price - 27.95
Picco .61
(screws 3mm x 12mm socket head)
(center to center = 27.69mm/1.090") 		MAC6888
(Picco .40 & .60 Adapter Plates are custom milled to fit this system)
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.90-1.20 Size Adapter Plates
(use with #7010 adapter mufflers)
(Only Adapter Mufflers require Adapter Plates)
Price - 22.95
DLE 20
OS 22 GT
Y.S. .90 &.91 SR, .91 ST(bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 32.21mm/1.268") 		MAC7208
new .?? (older - bolt-on)
(screws ?/?? x ?/?" socket head)
(center to center = ??.??mm/?.???") 		????
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Old non-bolt motor - strap-adapter system

(See these photos on the Photo Gallery Page->Mufflers->Custom Strap-On)


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