How much hp gain with straight pipes ?

**98Z28importslayer** · 04-23-2008, 08:12 PM

how much hp gain would you get on straight pipes on a 98 z28 (ls1) its stock besides for lid and free mods. It has Offroad Y pipe and straight piped (3" pipe) with stainless steel tips (expensive tips but they dont rust highly recommened

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**jz28** · 04-23-2008, 10:03 PM

Good Question. I'm Wondering The Same Thing. Are You Thinking Of Just Eliminating The Cats? Thats Wat I Want To Do I'm Currently Running A 3'' Y-Pipe With Slp Cat Back. I Was Told It Wasnt Recommended, It Would Just Create Turbulence In The Muffler. Not A Big Gain..

**98Z28importslayer** · 04-23-2008, 10:19 PM

yeah im wondering how much hp i would net from going with straight pipes which means no muffler and cat. with a offroad Y pipe. I have a cherry bomb custom system on there right now it sounds alright but i want a deeper tone and a few extra ponies. So im going to have my friend weld in a straight pipe where the muffler and cat. was. DO NOT go to a muffler shop just to do a straight pipe set up and i already had the muffler off they wanted to charge me $220 without tips

. Also they cant touch the cat.

**jimmybling31** · 04-23-2008, 10:26 PM

Originally Posted by 98Z28importslayer

yeah im wondering how much hp i would net from going with straight pipes which means no muffler and cat. with a offroad Y pipe. I have a cherry bomb custom system on there right now it sounds alright but i want a deeper tone and a few extra ponies. So im going to have my friend weld in a straight pipe where the muffler and cat. was. DO NOT go to a muffler shop just to do a straight pipe set up and i already had the muffler off they wanted to charge me $220 without tips

. Also they cant touch the cat.

I like my exhaust shop I go to. he is a hot rodder with multiple chevy performance cars from z06- ss's. he's pretty cool. he lets me work with him on my car. that's how I got mine set up the way it is. he just told me what to do with the ory on the welds to make it work right and that's it.