2.5 is good for turbo but only if you are boosting around 20 psi. RA will boost less than 10 psi and N//A is worse. Stay with 2.25. I have seen this over and over and it is the truth. 2.5 inch exhaust will be a big regret.

ROAD/RACE

 

hmmm... thats interesting... guess i could always have the section after the 2nd o2 sensor made 2.25, the part that wraps around the lower arm is bent pretty good so its no nearly 2.5 anymore

is their anyway to get back some of that lost lowend torque i've heard u loose with a 4-1 header such as yours ROCK

 

You gain mid and top end power with our header. You barely loose a little bottom end power. That is where a pulley or light flywheel, timing box or even a piggy gets you over the loss and puts you right into MIVEC before you know it! Kinda like spooling up quicker. Best way to explain it.

PS. DO NOT GO 2.5 inch exhaust. Those are the guys feeling the lost low end power.

ROAD/RACE

 

Well crap guess I gotta go get it redone lol. Oh well ill change the shop anyway seeing as how they told me they were gunna use mandrel bent when after installing the headers I find it pressed >

 

lol too late, already did the 2.5, and yea theres definitly a loss in the low end

well it'll be an easy fix since the only real portion of the exhast thats straight 2.5 is the section after the cat to the axle, due to the bends around the axle its not really 2.5 now

 

I've got a 05 es 2.4L and I was wondering if ralliart headers would fit, and if so would it make any difference?

 

if its the 4g69 motor yes they will fit, wasn't aware there was a 2.4l es model

 

and i just happen to have a rallairt header,dp and cat just sitting in my basement

 

Re: soulesswarrior-
yeah apparently its pretty uncommon but there are some 2.4l es models out there

 

2.4 ES from where? Where are you located?

ROAD/RACE

 

Really???

 

Wierd. Never heard that. Maybe in some foreign country?

ROAD/RACE

 

does anyone else notice a slight tingy noise under acceleration? one of my buddies said maybe its the valves i dunno, just something i noticed post header install...

 

i think thats just the raspyness from the header/dp?

 

Raspy is fun!

ROAD/RACE