Header Reducer

[TwistedFrame21]

Anyone run the schoenfeld reducers in 604 crate headers? Also what is the preferred step?

[brad hibbard]

are you asking about reducing the collector diameter?

if so we have had better results on the schoenfeld stuff by increasing length

1 5/8 to 1 3/4 primary tube is very common with all the header manufacturers
most common areas to work with are collector diameter and length ---also muffler position and design

Brad

https://www.race-1.com

[TwistedFrame21]

Thanks for the reply Brad, I sent you a pm

[95shaw]

Do you have any experience with IMCA mufflers? collector and turndown 19 inch length. Muffler does not count in this dimension.

Thanks

[brad hibbard]

what is the muffler part #

Brad

https://www.race-1.com

[stock car driver]

IMCA muffler robs hp and tq its terrible for performance