Ive got an older set of fenton exhaust manifolds that have the heat riser section that connects to the intake... (similar to original intake/exhaust connection) Has anyone used a setup like this? My question is will the heat riser (without heat riser flapper) add too much heat to the intake if used with a 1 bbl original intake? There is no heat riser flap to control how much heat is supplied to intake. Would it cause problems the same as if heat riser is stuck in position to direct heat to intake?

they don't make this version anymore... was it known to have problems or is the heat riser section on fentons a benefit?

My goal is dual exhaust with a single 1bbl carb for good drivability. I have considered going with a modified original exhaust manifold to provide dual exhaust and have the heat riser still functional but the dual exhaust added section is usually for the back 2 cylinders on modified originals, and the fentons use the 2 front cylinders for the second header... my present truck has dual carb/dual exhaust setup with normal fenton exhaust manifolds... if I change from fentons to modified originals I would need to modify my exhaust pipes also... preference is to not change exhaust system also.

truck is a 1940 chevy 1/2 ton with 1957 235. all original other than dual intake/exhaust added.

thanks..

Old Truck addict
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