Thread: Matt's tuning fun

That was a no go.

Plenty o' KR.

Bought a magnaflow catback.

Sounds poopy.

But with a 3.6 pulley, 11.7 AFR, 17*, it felt slower than with the stock catback.

So I threw the 3.4 on and had a go at it.

Same AFR, same timing, no knock. That being previously impossible.