Had a customer recently dyno my SI Header. This is the 06-08 SI header we had developed. SSR Clone. Comes with test pipe and such.

Year ago customer made 193whp with Intake and Exhaust with a stock header on stock ecu.

Yesterday he bolted my header on, and made 203whp. Not bad, 10whp gain. Then he tuned it with KPRO, and he picked up ANOTHER 10whp!





Pretty cool , these K20 motors are making damn near 220whp with just I/h/e an tuning!