sonicblu

has anyone tried deleting the cats from the stock headers ? would there be any power gain or loss ?

H60Driver

I don't think anyone here has done it but it has been discussed multiple times. I believe the consensus is that it would free up a pretty good amount of ponies. I plan on doing this as soon as I pull the trigger on a nitrous system.

imp0rted1

mrslay has.. maybe he can chime in

Meraki Autoworks

iTrader: (8)

damn why didnt i do this ...

ISFpat

iTrader: (10)

Can you chop it off while its still on the car? If not then theres no real value in it.. stock headers have such a basic design and the power you'll get from deleting cats are debatable.

sonicblu

I went to a local muffler shop and they said that with a special tool they can bore out the insides and all i would need is a o2 sim/conditioner so that the cel don't pop up i will try this out to see what happens .

Cobra1

Very cool, thanks for taking one for the team!

FNSSESPORT

I'm interested to see how this turns out.

Lmood

iTrader: (3)

More than likely a drill motor with a hanger rod attached to it lol.

thekhmer

iTrader: (2)

there special tool is a baseball bat lol
let us know how it goes and smells..(srs) my evo x had no cats and after sitting in traffic the smell would find its want into the trunk and into the back seat area

Cronic

iTrader: (1)

I have a brand new PPE o2 conditioner if you wanna buy it for your project.

MRxSLAYx

In my opinion, my first isf was faster with gutted primary cats than when it had headers. Ive raced other ISFs with headers and I have yet to see anything to prove otherwise.

H60Driver

Did you have your cat gutted or cut off and replaced with straight pipe? Did you do it your self and also did you need a o2 conditioner?

flowrider

iTrader: (9)

You've said this many times. Please show us a dyno.

Lou

DCoolBeans

I'll be your dyno....

Me and Slay raced not to long ago. We both data logged our cars, wot runs and A/F mixtures were great.
We raced from a 40mph roll till 160mph. We were head to head. At 90, 120, 140mph I jumped a foot at each. At 160mph I was only up by 3 tiny feet.

My car: afe filter, ppe header, isa cat back, iss scoops (a whole lotta $)
Slays: gutted primary cats w/ ppe 02 conditioner, replaced mufflers & secondary cats with straight pipes (he saved a lot of $, lol)