I have noticed that some members are runing a 3 inch exhaust. Does anyone have dyno numbers for this? I would think that a 3 inch exhaust on these cars would be overkill. Just wondering before I install the 2.5.

 

Unless you plan on going over 350 HP, the 2.5" is fine.

 

What if you plan on doing 300whp for now...2.5" should be good enough, don't you think?

 

i dont have a dyno but theres more up high on the car now.....i plan on build into that 400hp area....at least 320's or so....i think 3in is the way to go.

 

I put on a 3" with only a cai and I really enjoyed the new kick. I dynoed 232 with i\h\e.

 

3 inch isint necessary for our SC applications due to lack of backpressure. You would probably lose power.

 

nope gains across the board dyno proven....also makes the s/c boost quicker
free out free in!

 

word^^^^^

 

I was talking about torque so I dont know about that...

 

Can someone else confirm this?

 

well we saw gains with both and not 1-2hp either!

 

I lost nothing. I felt the added pull as soon as I drove away from the shop. I have no regrets. And for anyone planning on doing an engine upgrade later your set for whatever you throw at it.

 

I want to see what a 2.75 would do.....I wonder if that would give us optimal gains.

 

https://www.cobaltss.net/forums/show...ht=3in+exhaust

Can we debate this again?

 

Personally this debate is like asking a woman and a guy how it feels to give birth. Until the guy craps a watermelon he is just debating opinion, not fact.
There are alot of opinions on how well a 3" will work but unless a person puts one on then they are only giving an opinion, not fact (with our cars)