Water Cooling Insert Plates
(Placed in-between the motor and the header plate)

Egnine(s) Fitted	Price	Item #
K&B .21 R - O.S. .21 VF, VR, RZ-M	22.95	9641
K&B 6.5-7.5	23.95	9661
O.P.S. .40 R		9671
O.S. .46 VX-M		9681
O.P.S. .65 R	24.95	9701
O.S. .61-.75 VR - VR-M		9711

.91 Engines ( 7/8" o.d. 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.)	0°	15°	1.75" fuse-top
	29.95	29.95	36.95
K & B .82-1.0 (bolt on)	3880	3881	3882
O.S. .77-.91 VF,VR,VR-M,RF(bolt on) (doesn't fit the O.S. .91 RZ-H)	3890	3891	3892
O.S. .91 RZ-H (doesn't fit the O.S. .77-.91 VF,VRorRF)	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" o.d. 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.)	0°	20°	1.75" fuse-top
	34.95	34.95	43.95
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 is the same.)	4740	4741	4742-**
TT 120 R (screws 4mm x 12mm socket head) (center to center = 33.98mm/1.338")	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")	4780	4781	4782-**
1.8-2.7 Engines ( 7/8" o.d. 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.)	0°	20°	1.75" fuse-top
	38.95	38.95	53.95
RCMK R254 (screws 5mm x 16mm socket head) (center to center = 34.29mm/1.350")	4800	4801	4802
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

+ - 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.
** - lower and higher off-set fuse-tops may be available
!! - the snap is a grove on the inside of the header to hold the header to the o-ring
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