No clearance issues with oil filter, spark plugs, starter, kick out oil pan, rear mounts, valve cover. Clears firewall that is minimum 7" from back of block. 1 5/8 Primary. 8" long x 3" Dia collector.

Fits straight or angle plug heads, Exits over frame rail. (Both sides), Will not fit with stock firewall. 1 3/4" Primary. 8" long x 3 1/2" dia collector.

Fits straight or angle plug heads, Exits over frame rail. (Both sides), Will not fit with stock firewall. 1 5/8" - 1 3/4 Primary. 8" long x 3 1/2" dia collector.

Fits straight or angle plug heads, Exits over frame rail. (Both sides), Will not fit with stock firewall. 1 5/8" Primary. 8" long x 3" dia collector.

5/16” flange, 16ga primaries, 2 1/4" 16ga reducers included, excellent spark plug access. 1 5/8 Primary, 5" Long x 3" dia collector. Crate Motor USRA Legal Buy Elbows and Turnouts Elbows: Left side SCH2242L (42 degrees 2 1/4") Right Side SCH2245R...

5/16” flange, 16ga primaries, 2 1/4" 16ga reducers included, excellent spark plug access. 1 5/8 Primary, 5" Long x 3" dia collector. USRA Legal

Fits BMS, Dirtworks, Hoffman, Jet, KMOD, Bob Pierce, Pierce Platinum, Rocket, Sardeson, Smiley's, Swartz, Victory, Xtreme. 1 3/4 Primary. 3 1/2" Collector

Fits BMS, Dirtworks, Hoffman, Jet, KMOD, Bob Pierce, Pierce Platinum, Rocket, Sardeson, Smiley's, Swartz, Victory, Xtreme. 1 5/8 - 1 3/4 Primary, 3" Collector - 8" Long. Crate Motor

Fits BMS, Dirtworks, Hoffman, Jet, KMOD, Bob Pierce, Pierce Platinum, Rocket, Sardeson, Smiley's, Swartz, Victory, Xtreme. 1 5/8 Primary, 3" Collector - 8" Long. Crate Motor

Fits BMS, Dirtworks, Hoffman, Jet, KMOD, Bob Pierce, Pierce Platinum, Rocket, Sardeson, Smiley's, Swartz, Victory, Xtreme. 1 5/8 Primary, 3" Collector - 8" Long.

Fits Billsbuilt, Impressive, GRT, 2019 and newer Larry Shaw, Ruhlman. 1 5/8 - 1 3/4 Primary, 3 1/2" Collector.

Fits Billsbuilt, Impressive, GRT, 2019 and newer Larry Shaw, Ruhlman. 1 5/8 - 1 3/4 Primary, 3" collector. Crate Motor