Page 378 - 2018 Racecar Engineering Open Wheel Parts and Accessories Catalog

SuperTrapp’s exhaust outlet is actually a series of precise gaps between diffuser discs. As exhaust travels from the center of the diffuser
disc toward the outside, it moves into a larger area, creating a pressure drop; and exhaust gases are drawn out or scavenged. Adding discs
increases the size of the outlet, thereby reducing back pressure, increasing top end power and sound level, while leaning out carburetion. By
adding or subtracting discs, the power band can be quickly and easily adjusted.
Model 549 Short S/C Standard Model 544 Disc Only
SPR549-3514 Disc-Only models depend only upon the discs for
Muffler has 3-1/2" diameter noise reduction and are ideal for limited space. The
inlet, 3" core and is 14" long. 544 models use 5" diffuser discs.
Weighs 6.5 Lbs. Part No. Description
SPR544-2503 Fits 2-1/2" Diameter Pipe
SPR544-3003 Fits 3" Diameter Pipe
Model 549 Long S/C Standard SPR544-3503 Fits 3-1/2" Diameter Pipe
Mufflers are 18-1/2" long
with a 5" diameter and a 5" Diffuser Disc Packs
choice of 2-1/2", 3", and Add discs to decrease back
3-1/2" inlets and 2-1/2" or 3" pressure, increase top end perfor-
cores. mance... and noise level. Remove
Part No. Description discs to lower noise level, with an increase in bottom end power.
SPR549-2519 Model 549 Long Muffler, 2-1/2" Inlet, 2-1/2" Core Part No. Description
SPR549-3019 Model 549 Long Muffler, 3" Inlet, 3" Core SPR504-6506 6-Pack
SPR549-3519 Model 549 Long Muffler, 3-1/2" Inlet, 3" Core SPR504-6512 12-Pack

Stainless Steel Oil Restrictors STF7228
Restrictors have inverted hex for flush installation in rear of block. They will restrict lifter/rocker arm oil passage to a .060" diameter hole,
cutting oil volume by more than 70% and diverting it to the main and rod bearings. Fits small block Chevy.
Note: Not for use with hydraulic lifters.

How To Books And CDs
Books and CDs for new or experienced
racers. Each book is packed with informative 5-Gallon Utility Jugs
photos and illustrations.
Heavy duty utility jugs are constructed from high density polyeth-
Part No. Description
SSAS217 The New Racer’s Tax Guide ylene, utilizing a tri-ribbed bottom that adds strength and doubles as
SSAS282 Sprint Car Chassis Technology a multi-grip pouring handle. Offered in a wide variety of colors. Sold
SSAS287 Kart Chassis Set-Up complete with cap.
SSAS294 Quarter Midget Chassis Technology Part No. Color
SRJR7100CL Clear
SRJR7100WH White
SRJR7100YL Yellow
SRJR7100BL Blue
SRJR7100RD Red
SRJR7100PU Purple
SRJR7100BK Black
SRJR7100OR Orange
SRJR7100PK Pink
SRJR7100GR Green
Replacement Components/Accessories
SRJR3044 Deluxe Filler Hose
SRJR5226 Plastic Hose Valve
SRJR4045 Aluminum Hose Valve
SRJR1110BKSQ Lid With Hose Adapter
SRJR1100 Standard Lid
SRJR800-414 Reflective Jug Cover
SRJR6200RD D-Shaped Funnel
SRJR6201 Stainless Screen For SRJR6200RD
SRJR1200BK Replacement Jug Vent
PAUL McMAHAN JOHNNY B
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