Hi
If fitting a high flow cat to a JDM Series 8 RX-7 (1999), will boost spike and need controlling, or will a high flow still provide sufficient back pressure to prevent overboost/creep/spiking?
Many thanks.
Shouldn't cause any issues especially if you have the stock ECU fitted as this would just protect the engine and boost cut if it saw a too higher boost level anyway.
Yes, ok, that's what I suspected but thought I'd check with those more knowledgeable!
Cheers :)