Exhaust and tunning

[Qckslvr]

I too have had varying success with headers. Hooker headers for a 390 that took 2 hours of grinding, heat, and massaging to make fit a Mustang. Or OBX turbo header that crack midway through a race on a Miata.

So yes I am skeptical.

I live in CA, home of the smog demons CARB.

I am not opposed to changing the system back to stock every two years. So the tip on changing the bolts to studs, is greatly appreciated. I shall check into ARP.

I am looking for improved performance, and saving my very expensive cats from future replacement.