Each header is cutsom fit to the specific engine and includes applicable screws or strap.
Flexible connector and tie straps are not included.




Rear Exhaust Headers

PLEASE Note! MACS headers are not designed to support the tuned pipe
or in-line muffler that they connect to the motor they are attached to.

NUMBER STRIKE THROUGH MEANS WE ARE OUT OF STOCK

Fits Engines Stock #
.15-.20 Engines ( 9/16"od Alum. tubing / uses - 1/2"id Silicone tubing)
  15º 1"
fuse-top
K & B 3.5, O.S. .25 VF-DF
(screws 4/40x1/2"sochead for the K&B)
(screws 3mmx12mm sochead for the OS)
(center to center = 24.23mm/.954")
3350 3351 3352
MVVS .20R
(screws 2.5mm x 12mm socket head)
(center to center = 24.94mm/.982")
3370 3371 3372
STX .21R 3380 3381 3382
.40-.46 Engines ( 3/4"od Alum. tubing / uses - 5/8"id Silicone tubing)
 
15°

1.2"
fuse-top

Enya .45 CXL-R
(screws 3.5mm x 12mm socket head)
(center to center = 26.1mm?/1.028"?) n/a n/a n/a
K & B 6.5-7.5, Irvine .40 RE
(screws 4-40 x 1/2" socket head)
(center to center = 26.92mm/1.060")
3450 3451 3452
MVVS .40R
(screws 4/40 x 1/2" socket head)
(center to center = 28.75mm/1.132")
3470 3471 3472
O.P.S. .40
(screws 5/40 x 1/2" socket head)
(center to center = 27.58mm/1.086")
3480 3481 3482

O.S. .40-.46 VF, VR-M & VX-M
(screws 3.5mm x 12mm socket head)
(center to center = 26.11mm/1.028")

We have a 3523 thrust line

3520 3521 3522
YS .45 RF
(screws 3.5mm x 12mm socket head)
(center to center = 30.12mm/1.186")
3570 3571 3572
.60-.65 Engines ( 3/4"od Alum. tubing / uses - 5/8"id Silicone tubing)
  15° 1 1/2"
fuse-top
Enya .61 CXLR S-Pro+TN
(Doesn't not fit older .60X R)
(screws 3.5mm x 12mm socket head)
(center to center = 26.11mm/1.028")
3580 3581 3582
Enya .60X R
(Doesn't not fit new .61 CXLR)
(screws 4mm x 12mm socket head)
(center to center = 33.91mm/1.335")
3590 3591 3592
K & B .67 (11cc)
(screws 6/32 x 1/2" socket head)
(center to center = 31.75mm/1.250")
3600 3601 3602
Irvine .61 RE
(screws 6/32 x 1/2" socket head)
(center to center = 36.02mm/1.418")
3610 3611 3612
Moki .61 R
(screws 4mm x 12mm socket head)
(center to center = 28.24mm/1.112")
3630 3631 3632
O.S. .61 VF, RF & Hano Special
O.S. .65 VR-M
(screws 3.5mm x 12mm socket head)
(center to center = 30.12mm/1.186")
3680 3681 3682
MVVS .60-.77 R
Fox 60R
(screws 6/32 x 1/2" socket head)
(center to center = 33.91mm/1.335")
3720 3721 3722
Rossi .61 (Old snap-on O-ring/
no ring & spring )
(snap id=.948 / o-ring id=.970)
3760 3761 3762
Rossi .61 (NEW non snap-on O-ring/
Requires ring & spring)
(o-ring slid-in id=.935)
3770 3771 3772
S.T.X. .61 (bolt on)
(screws 3.5mm x 12mm socket head)
(center to center = 31.34mm/1.234")
3780 3781 3782
Webra .61
OPS .60
YS .61-R (new Classic)
(screws 4mm x 12mm socket head)
YS .61-R (old long-stroke)
(screws 3.5mm x 12mm socket head)
(center to center = 32.11mm/1.264")
3810 3811 3812
Y.S. .60R (std stroke)
(screws 4mm x 12mm socket head)
(center to center = 32.11mm/1.264")
3860 3861 3862
       
.91 Engines ( 7/8"od Alum. tubing / uses - 3/4"id Silicone tubing)
  15° 1 3/4"
fuse-top
K & B .82-1.0 (bolt on)
(screws 6/32 x 1/2" socket head)
(center to center = 31.75mm/1.250")
3880 3881 3882
O.S. .77-.91 VF,VR,VR-M,RF(bolt on)
(doesn't match the O.S. .91 RZ-H)
(screws 3.5mm x 12mm socket head)
(center to center = 30.124mm/1.186")
3890 3891 3892
O.S. .91 RZ-H
(doesn't match the O.S. .77-.91 VF,VRorRF)
(screws 3.5mm x 12mm socket head)
(center to center = 30.124mm/1.186")
3900 3901 3902
Rossi .91 R
K & B .82-1.0 (for O-ring)
O.S. .77-.91 VR (for O-ring)
(Old snap-on O-ring/ no ring & spring)!!
(snap id=.950!! / o-ring od=.970)
3930 3931 3932
Rossi .91 R
(non snap-on O-ring/ Requires ring & spring)!!
(o-ring slid-in id=1.088)
3950 3951 3952
       
1.2 - 1.5 Engines ( 7/8"od Alum. tubing / uses - 3/4"id Silicone tubing)
  20° 1.75"
fuse-top
Moki 120 R
(screws 4mm x 12mm socket head)
(center to center = 35.20mm/1.386")
4720 4721 4722
O.S. 140 RX
(screws 4mm x 12mm socket head)
(center to center = 33.98mm/1.338")
(the Syssa 30cc gas engine may have the
same exhaust mounting, but we cannot
verify that it has the same port.)
4740 4741 4742-**

TT 120 R
(screws 4mm x 12mm socket head)
(center to center = 33.98mm/1.338")

4764 1.25" fuse top

4760 4761 4762

Webra 120 LS R, 145, 145 XP & 160 XP, UAV 1.2 LS - 1.45 SP
(screws 4mm x 12mm socket head)
(center to center = 38.10mm/1.500")

4783 0.75" fuse top

4780 4781 4782-**
       
1.8 - 2.7 Engines ( 7/8"od Alum. tubing / uses - 3/4"id Silicone tubing)
  20° 1.75"
fuse-top
DLE 20 RA
(screws 4mm x 16mm socket head)
(center to center = 32.21mm/1.268")
4790 4791 4792

RCMK R254
(screws 5mm x 16mm socket head)
(center to center = 34.29mm/1.350")

4804 10°

4800 4801 4802

DLE 35 RA
(PTE 36 R?)?
(screws 5mm x 16mm socket head)
(center to center = 38.20mm/1.504")

4813 0.75" Fuse Top
4814 1.25" Fuse Top
4815 2.25" Fuse Top

4810 4811 4812
Quadra 42cc R
(screws 5mm x 16mm socket head)
(center to center = 35.00mm/1.378")
4860 4861 4862
Zenoah Q G-38 R
(screws 5mm x 16mm socket head)
(center to center = 36.27mm/1.428")
4880 4881 4882
       
3.0 - 4.8 Engines ( 1"od Alum. tubing / flex connector not included)
  20° 1.75"
fuse-top

D.L.E. 55 RA (now available)
(screws 5mm x 16mm socket head)
(center to center = 42.01mm/1.654")

4903 0.75" Fuse Top

4900 4901 4902
       
for tuned pipes for airplanes see Aero-Tuned Pipes
for tuned pipes for boats & helicopters see Marine & Helo-Tuned Pipes
Also see Special Application Headers


Please note MACS headers are not designed to support the Tuned Pipes
or In-Line muffler that are connected to them.
They (the Tuned Pipe or In-Line Muffler) must be self- supported.
MACS Products will not replace or repair headers used in this manner.