CoolGuy094

I was running upwards of 18 PSI observed on the dyno on 93 octane with a Novi 1220. No knock at the time, but knock prevention was set up in the Haltech to pull timing if it started.

And add another to stock exhaust and 400+ WHP, though I did have a 63mm test pipe.

picco97

Wow a lot of people making over 400whp with 60 or 63mm test pipe with exhaust

azride1983

Made 469/309 on kw v2 with testpipe n stock exhaust.

leo520

i made 400 with 60 mm dual exhauset n 10 psi

soulicious

My SOS kit with n1200 made 492/319 DynoJet with 10.5 AFR up top. I'm running stock exhaust with a test pipe.

s2000Junky

Novi 1200 on a low comp motor making 17psi with factory header and 60mm cat back est 425-450whp.

E4RTH WORM JIM

I gained 20WHP moving to a 60/50mm dual from a full 3" system

@16 psi

Brutus

Wondering about the torque numbers with stock/60mm/63mm. Are those numbers better down low?

E4RTH WORM JIM

/\ Yeah from my experience you get better torque and hp low down. My system held a linear increase till about 14psi then reduced slightly up to 16psi... But it still made 20whp more

hvAlfaWant_S2000

I'm pushing 390+ on Vortech S/C, stock block, stock header, and stock dual exhaust w/ Berk 63.5 mm TP.