2012
Each header is cutsom fit to the specific engine and includes flexible connector* and tie straps.




/.10 size are 7/32" less/ - /.20 size are 1/16" less/
/.90-3.2 are 1/16" more/ - /3.0-up are 1/8" more/

inch to mm -/- Std. 1 5/8"= 41.27mm
Long 2 3/8"= 60.325mm ex-long 3 1/8`"= 79.375mm

(Marine Headers are the same as standard Headers, but angling up out of a boat at 15° / 'degrees' or on a high wing airplane angling down - under the wing at 15° / 'degrees')

Engine(s) Fitted Price Stock #
  standardlongex-long 15° marine
.10-.15 Engines ( 9/16"od Alum. tubing / uses - 1/2"id Silicone tubing)
(+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.)
O.S. .10-.18 CV,FP,LA&FSR
K&B .18 (bolt through)
Magnum XLS.15
MDS .18 FS Pro
Thunder Tiger GP .10-.15
(screws 4/40 x 1 1/2" fillister head)
(center to center = 27.43mm/1.080") 		24.95 2040 2041 2042 2043
.20-.36 Engines ( 5/8"od Alum. tubing / uses - 1/2"id Silicone tubing)
(+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.)
HP .20 (bolt-on)
(screws 3mm x 12mm socket head)
(center to center = 27.94mm/1.100") 		27.95 2250 2251 2252 2253
MVVS .20 (bolt-on)
(screws 2.5mm x 12mm socket head)
(center to center = 24.94mm/.982") 		2260 2261 2262 2263
Irvine .20 (bolt-on)
(screws 4/40 x 1/2" socket head)
(center to center = 25.40mm/1.000") 		2270 2271 2272 2273
O.S. .20-.25 FP & LA
Magnum .21-.28 GP
Thunder Tiger GP .25
Super Tiger G .34 (bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 32.11mm/1.264") 		2300 2301 2302 2303
O.P.S. 3.5 (.21)
Norvel .25 BB (bolt-on)
(screws 5/40 x 1/2" socket head)
(center to center = 26.97mm/1.062") 		2310 2311 2312 2313
O.S. .21-.36 FS-SF-FX-SX-AX
(for OS.20-.25 FP or LA see #2300)
Enya .21CX, SS30, 35X-TN & 35XS
Evolution .36 NT
GMS 2000 ABC .25-.36
Jett .25-.35
Kyosho .32-.36 GT
Magnum XLS.25 & .25-.28 Pro
MDS .28-38 FS Pro
Thunder Tiger Pro .25-.36
Webra .25-.36 Speed (bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 35.05mm/1.380")
NovaRossi Rex R.28 CR (waiting
for exhaust mount verification) 		2340 2341 2342 2343
Super Tiger S .21-.34K (bolt-on) 2360 2361 2362 2363
.35-.55 Engines ( 3/4"od Alum. tubing / uses - 5/8"id Silicone tubing)
(+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.)
Enya .40-.45 X & CX (bolt-on)
O.P.S. .40
(screws 3.5mm x 12mm socket head)
(center to center = 29.97mm/1.180") 		28.95 2420 2421 2422 2423
Enya .40 SS(bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 42.16mm/1.660")
(can be used on a .40-.45 CX)
(that has the bolt-through holes) 		2430 2431 2432 2433
Enya 40XZ-TN & 40XZS (see-#2650) - - - -
Jett .40-.50 (not the 40L)
H.B. .40(bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 38.10mm/1.500") 		2490 2491 2492 2493
K&B.40 (bolt through)
(screws 5/40 x 1 1/4" socket head)
(center to center = 31.75mm/1.250") 		2530 2531 2532 2533
K&B.45 Sportster &.48(bolt through)
(screws 6/32 x 1 1/2" socket head)
(center to center = 35.15mm/1.384") 		2540 2541 2542 2543
MVVS .40 (bolt-on)
(screws 3mm x 12mm socket head)
(center to center = 28.60mm/1.126") 		2550 2551 2552 2553
Norvel AX .40 (see-#2800) - - - -
O.S. .40-.45 FSR (bolt-on)
ASP .40
Fox .45, & .50 BBRC
Irvine .40 (bolt on)
(screws 3.5mm x 12mm socket head)
(center to center = 27.94mm/1.100")
HP .40 (bolt-on)
(screws 3mm x 12mm socket head) 		2580 2581 2582 2583
O.S..40-.46 FX,SF (bolt through)
O.S..46-.55 AX, .50 SX
ASP .46 Evolution.40-.46 NT
& .46NX, .52NX, .60NX & TrainerA
GMS 2000 ABS .40 & .47
Magnum XLS .46-.52
MDS .40-.48 FS Pro
Mecoa .40-.46
Rossi .45-.53 (new-bolt through)
Royal .46
Tower .46 (bolt through)
Thunder Tiger Pro .40-.46
Y.S. .56 SR (bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 37.08mm/1.460")
NovaRossi Rex R.46/.57 CR (waiting
for exhaust mount verification) 		2590 2591 2592 2593
Rossi .40,.45&.53 (bolt-on)
Powerhouse .40-.45
(Won't fit the new Bolt-Through motors)		 2600 2601 2602 2603
Super Tiger GS .40-.45-.51
Como .40-.51 (bolt through)
(screws 6/32 x 1 1/2" fillister head)
(center to center = 38.61mm/1.520") 		2620 2621 2622 2623
Super Tiger S .40-.45 (K)
Como .40-.45 (bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 38.61mm/1.520") 		2630 2631 2632 2633
Webra.40-.55 Speed(bolt through)
(screws 4/40 x 1 1/2" fillister head)
(center to center = 39.12mm/1.540") 		2640 2641 2642 2643
O.S. .40-.46 FP & LA (bolt through)
Enya 40XZ-TN & 40XZS
Evolution .40NX
Jett .40L
Magnum .40-.44GP
ThunderTiger GP .42 & .46
Webra .40 RC (non-Speed)
(screws 4/40 x 1 1/2" fillister head)
(center to center = 35.05mm/1.380") 		2650 2651 2652 2653
Webra .40 Speed (old strap) 2660 2661 2662 2663
YS .45 SF (bolt-on)
(The new YS.56 SR is a bolt-through)
(motor - use a #2590-2593 ) 		2670 2671 2672 2673
.50-.75 Engines ( 3/4"od Alum. tubing / uses - 5/8"id Silicone tubing)
(+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.)
Enya.45-.50SS & .50CX
&.61CX TN & CXS PRO (bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 42.16mm/1.660") 		29.95 2710 2711 2712 2713
H.P. .61
Webra .61 Speed (old strap-on)
(countersink 1.658"lx.433"hx.062"d) 		2730 2731 2732 2733
Fox .60 Eagle III (bolt-on)
Irvine .61
(screws 6/32 x 1/2" socket head)
(center to center = 34.80mm/1.370") 		2750 2751 2752 2753
K & B .61 , H.B. .61
Jett .60 L(not the .65, .67L or .76L)
Webra .61 BH (bolt through)
(screws 5/40 x 1 1/2" socket head)
(center to center = 38.10mm/1.500") 		2770 2771 2772 2773
K & B .65 Sportster (bolt through)
(screws 6/32 x 1 1/2" socket head)
(center to center = 38.10mm/1.500") 		2780 2781 2782 2783
Kraft .61 (bolt-on)
RJLK .61
Y.S. .61 long
(Norvel AX .40)
(screws 3.5mm x 12mm socket head)
(center to center = 32.21mm/1.268") 		2800 2801 2802 2803
Moki .60 (bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 28.24mm/1.112") 		2810 2811 2812 2813
MDS .58 FS Pro 2820 2821 2822 2823
O.S. .50 FSR & .61 FSR
ASP .61
Enya 60X
MVVS .61-.77
Webra Speed .61-.70 F (bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 33.91mm/1.335") 		2850 2851 2852 2853
O.S. .61 FX & SF, .75 AX
O.S. .60 FP & LA, .65 LA
Evolution .61NT & .61NX
(will not fit the .60NX - see #2590)
GMS 2000 ABC .61 (not the .76
or the .61 ringed, the new ringed .61
is a bolt-on not a bolt through
see #2890 - #2893)
Jett .67L & .76L (not the .60L or .65)
Magnum XLS.61 & .61 Pro
MDS .68-.78 FS Pro
Rossi .60-.65 (new)
ThunderTiger GP & Pro .61
Webra .61-.75 P5-H (bolt through)
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656")
NovaRossi Rex R.60 CR (waiting
for exhaust mount verification) 		2860 2861 2862 2863
Rossi .61 & .61
Powerhouse .60 (bolt-on)
(screws 4mm x 12mm socket head)
(center to center = 36.12mm/1.422")
(Won't fit the new Bolt-Through motors) 		2870 2871 2872 2873
Tower .61 & .75
GMS 2000 .61 ringed
GMS 2000 .76A
(screws 4mm x 12mm socket head)
(center to center = 40.13mm/1.580") 		2890 2891 2892 2893
Super Tiger G .60, S .61-.75
Jett .65 (not the .60L, .67L or .76L)
Como .61-.75 (bolt through)
(screws 6/32 x 1 1/4" fillister head)
(center to center = 47.12mm/1.855") 		2900 2901 2902 2903
Super Tiger S .61 K, .75 K (bolt-on)
(screws 3.5mm x 12mm socket head)
(center to center = 47.12mm/1.855") 		2920 2921 2922 2923
Y.S. .60 (non long-stroke)
(screws 4mm x 12mm socket head)
(center to center = 32.21mm/1.268") 		2930 2931 2932 2933
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




Engine(s) Fitted Price Stock #
  standardlongex-long 15° marine
.90-1.20 Engines ( 7/8"od Alum. tubing / uses - 3/4"id Silicone tubing)
(+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.)
O.S. .90-1.08 FSR (old three bolt) 39.95 2940 2941 2942 2943
MVVS .91 - 1.08
ASP .90-1.08
Magnum .90-1.08 (bolt-on)
(screws 4mm x 16mm socket head)
(center to center = 33.91mm/1.335")		 2960 2961 2962 n/a
Super Tiger G 90
Jett .90-1.20 (bolt through) 		2970 2971 2972 2973
O.S. 91 FX, SX& SZ .95 AX
ASP .91
Magnum .91 Pro
Webra .91 P5 & i (bolt through)
(screws 8/32 x 1 3/4" fillister head)
(center to center = 42.06mm/1.656")
NovaRossi Rex R.91 F/CR (waiting
for exhaust mount verification) 		2980 2981 2982 2983
Y.S. .90 &.91 SR, .91 ST (bolt-on)
(screws 4mm x 16mm socket head)
(center to center = 32.21mm/1.268") 		2985 2986 2987 n/a
O.S. 120 AX 2990 2991 2992 2993
1.2-1.5 Engines ( 7/8"od Alum. tubing / uses - 3/4"id Silicone tubing)
(+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.)
Irvine 120-150 47.95 4050 4051 4052 n/a
ASP 120
Evolution 100 NT & 1.20 NX
Magnum XL 120		 4070 4071 4072 n/a
Super Tiger G 2300 4090 4091 4092 n/a
Thunder Tiger 120 Pro 4100 4101 4102 n/a
Webra 120
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") 		4130 4131 4132 n/a
Zenoah G-20,G-23,G-26
Homelite 25
(screws 5mm x 16mm socket head)
(center to center = 34.29mm/1.350") 		4150 4151 4152 4153
1.5-3.2 Engines ( 7/8"od Alum. tubing / uses - 3/4"id Silicone tubing)
(+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.)
D.L.E. 20(in design-sub#2985-2987)
(screws 4mm x 12mm socket head)
(center to center = 32.21mm/1.268") 		53.95 4200 4201 4202 n/a
D.L.E. 30 (in design)
(screws 5mm x 16mm socket head)
(center to center = 33.98mm/1.338") 		4210 4211 4212 n/a
Evolution 26cc
MVVS 1.6
(screws 4mm x 12mm socket head)
(center to center = 35.94mm/1.415") 		4220 4221 4222 n/a
Moki 1.5-1.8-2.1
Mark 1.5-1.8-2.1
(screws 4mm x 12mm socket head)
(center to center = 34.08mm/1.342") 		4230 4231 4232 n/a
Sachs Dolmar 2.0
Brison 2.4
(screws 5mm x 16mm socket head)
(cntr-cntr=26.60x20.37mm/1.026x.802") 		4270 4271 4272 n/a
Sachs Dolmar 2.6-3.2 ci
Brison 3.2
(screws 5mm x 16mm socket head)
(center to center = 35.31mm/1.390") 		4280 4281 4282 n/a
Super Tiger S 2000,2500,3000,3250
(screws 4mm x 12mm socket head)
(center to center = 44.25mm/1.742") 		4300 4301 4302 n/a
O.S. 3500, 160
Super Tiger S 4500
(screws 5mm x 16mm socket head)
(center to center = 44.00mm/1.732") 		4310 4311 4312 n/a
3W 35cc & 70-80cc Twin (3W41i,
3W50i, 3W85i, 3W100i, 3W40,
(screws 5mm x 16mm socket head)
(center to center = 36.32mm/1.430")
3W 70B2-These are unverified ) 		4360 4361 4362 n/a
ZDZ 40 (2.4) (screws 5mm x 16mm socket head)
(center to center = 37.18mm/1.464") 		4380 4381 4382 n/a
Zenoah 445 Twin, GT-80 & G74 (screws 5mm x 16mm socket head)
(center to center = 38.35mm/1.510")
 4400 4401 4402 n/a
Zenoah G-45
(screws 10x32 socket head+square nut)
(center to center = 42.42mm/1.670") 		4420 4421 4422 n/a
3.0-4.8 Engines ( 1"o.d. Alum. tubing )
(*flex connector not included - see our NEW "Ultra-Pure Silicone Tubing")
(+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.)
Quadra 52cc
(screws 5mm x 16mm socket head)
(center to center = 38.35mm/1.510") 		59.95 4460 4461 4462 N/A
Sachs Dolmar 3.7 - 4.2
Brison 4.2
Fox 150
(screws 6mm x 16mm socket head)
(center to center = 37.90mm/1.492") 		4480 4481 4482 N/A
3W 35cc & 70-80cc Twin (3W41i,
3W50i, 3W85i, 3W100i, 3W40,
3W 70B2-These are unverified ) 		4510 4511 4512 n/a
DL 50, DLE 50
3W 60cc & 120cc Twin
B.D. 5.1 Twin, ZDZ 50
(screws 5mm x 16mm socket head)
(center to center = 40.00mm/1.574") 		4520 4521 4522 N/A
Webra 4.4 Bulli
Celti Husky 4.2
A/3 (A*A*A) 4.4 - 8.8
JPX 8.4 - 8.8
(screws 6mm x 16mm socket head)
(center to center = 40.28mm/1.586")
(for the Mahle case) 		4540 4541 4542 N/A
Zenoah Q G-62
(screws 10x32 socket head+square nut)
(center to center = 42.42mm/1.670") 		4560 4561 4562 N/A
4.5-up Engines ( 1"o.d. Alum. tubing )
(*flex connector not included - see our NEW "Ultra-Pure Silicone Tubing")
(also available in custom 1 1/8 o.d. Alum. tubing - call)
(+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.)
Herbrandson 217 & 280/290
(screws 1/4 x 20 socket head)
(center to center = 52.17mm/2.054") 		68.95 4600 4601 4602 N/A
Herbrandson 280 (1 1/4 tube)
(screws 1/4 x 20 socket head)
(center to center = 52.17mm/2.054") 		85.95 4610 4611 4612 N/A
Husky 6.0
Celty Husky 5.8
(screws 6mm x 16mm socket head)
(center to center = 42.23mm/1.820") 		68.95 4620 4621 4622 N/A
Sachs Dolmar 5.8
Fox 200
(screws 6mm x 16mm socket head)
(cntr-cntr=40.28x5.64mm/1.586x.222") 		4660 4661 4662 call-!
BME 58/116 Xtreme
BME 50 Classic
(screws 5mm x 16mm socket head)
(cntr-cntr=24.73x19.10mm/.974x.752") 		4670 4671 4672 N/A
+ - 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.
! - This header is available in an Extra-Extra-Long - for info. contact us.
for tuned pipes for airplanes see Aero-Tuned Pipes
for tuned pipes for boats & helicopters see Marine & Helo-Tuned Pipes
NEW!! Also see Special Application Headers


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Macs Products
7935A Carlton Rd.
Sacramento, CA 95826
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