gr8one99SS

iTrader: (4)

i have a forged 370 with ported 243s around 11.7 to 1 compression that will see 150 to 250 sot of juice. Are 1 3/4 ok or will 1 7/8 be better. i will have ory and gmmg catback? looking for best performance. thanks

brian_rs/ss

1 7/8 for sure, also with that small diameter of an exhaust i would run dual cut outs for the track. or drop the coin on a 4" mufflex system and FM merge.

gr8one99SS

iTrader: (4)

want to get arh headers and y pipe. was debating a 4in outlet ae y with cutout then taper to 3in to connect gmmg. cutout for track

brian_rs/ss

^yeah that should suffice. and should sound awesome.

LS6427

iTrader: (2)

Won't you lose a bunch of N/A torque with 1 7/8"? I would say 1 3/4" with cut out right after the merge.

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brian_rs/ss

^no...he is running slightly bigger cubes, more compression, and a shot. the bigger diameter headers and i-pipe will shift the power/torque curve up higher, especially when the cut out is open. when closed the GMMG cb should increase exhaust velocity and shift some power and torque back down low for street driving.

gr8one99SS

iTrader: (4)

thanks guys anybody got pics of how and where to put cutout?

brian_rs/ss

do u want a single cut out or dual cut outs?

brian_rs/ss

https://ls1tech.com/forums/generatio...heads-cam.html

this should help.

gr8one99SS

iTrader: (4)

geat read brian. thx. do you know where i can find the 4 in i pipe with cutout in stainless?

TImmy_Jones

iTrader: (4)

I believe Tick performance makes 3", 3.5", and 4" stainless cutouts.