HFC's
 

Currently trying to find high flow cats for a DE engine that has long tube headers. Bought my Z with test pipes on it and am tired of the rice from 2.5-3k rpms. Can anyone find a link to short HFC that fit with long tubes. I know Kinetix used to make them but i can't find them on their site anywhere.
Thanks guys.

you might just have to get a universal one and weld them in somewhere in line

Summit racing has several to choose from.

Motordyne XYZ pipe gets rid of the rasp if you use the HFC or resonated module.

If you have longtube headers already, as ^ mentioned XYZ with HFC/resonator module, or weld them into your existing setup.

If you're looking for longtube headers with HFC's built in, PPE has the option, just email/call. The Motordyne TDX2 exhaust also comes with optional HFC built-in midpipes.