Im gm stg 3 i have 3inch catless dp that goes to 2.5 im on stock catback with magnaflow muffler but going to get 2.5 catback and how will it run with JBP header over another shorty header.

 

probably high 13's if you can launch, and shift good

 

Alright should I just get over axel piece or full 2.5 like megans

 

im not an lsj guy, but if you have 3" at the dp why not do 3 all the way back?

 

I won't unless I go tvs because 3 inch all and you will lose power

 

not necesarilly

 

I would say 12.9 to 13.5. Getting the same tune shortly so i guess we will find out believe your still stage 3. Should be interesting after it gets tuned.

Currently have no tune and running 13.617 already.

Here is my 13.624@103.35
YouTube - Cobalt SS/SC GM Stage 2 13.624@103.35

 

bolts up to the stock system and still roughly produced 15hp gains. So why not, wont gain that much more with 3.

 

it will pull 4006mph trap speeds

 

damn i was hoping for at least 4500 mph traps.. FML haha

 

ya keep dreaming

 

lol bullshit on getting a 12.9 with his mods. thatll be the day. he will prob run a 13.4-13.8 depending if he can launch.

 

Already running almost 13.5 with less mods and still untuned so with him being tuned and getting the zzp shortys on there I see no reason why he can't run 12.9. People running those times are really not that far off.

Look at the 1/4 posts on lsj running 12.9 and look how little I need to pickup to get those times.

 

I bought jbp vortex header

 

Dont think there all that much to pickup going down the 1/4 mile .547 of a second should do it.

My Best So far
13.617@103.45
R/T: .419
60': .2114
330: 5.807
1/8: 8.813
MPH: 81.06
1000: 11.413
1/4: 13.617
MPH: 103.45

LSJ 12.9 Run
12.9536@198.56
R/T: .2406
60': 1.9744
330: 5.6561
1/8: 8.5038
MPH: 88.64
1000: 10.8663
1/4: 12.9536
MPH: 108.56

 

with slicks or drag radials right