Im debating on Crawford HF's, and from searching, all I find is mixed messages and opinions on power gains. Some say between 5-7 WHP, Others say they didnt feel much of a difference if any atall (other than sound)..

How much TQ do they generally add though? Is it noticeable in the Butt Dyno or not? I'd think, if the OEM cats are as restrictive as people say they are, there should be a significant difference felt when replaced with HF's.

 

i noticed mine definitly


my advice is this:

save up and buy a good exhaust, crawford headers, cats, and plenum

dont install untill you have them all (to save money and for a cool effect)


get them all installed together and totally feel the difference

btw, i felt mine when they wint in

 

Im not going "All out" on this car...I currently have what is in my sig: K&N Drop in, Borla TD...Im leaving the headers stock, and was wondering what the HF's (by themselves) gain. Other than that, TS Flash when it comes out, then Im done modding.

 

well, i felt my high flows, but sory about my previous post

I am totally insanely mad about modifying this car, i have spent close to 10k on it


well, there you have it


get the crawford headers, if its the last mod you do
seriously, HUGE GAINS

 

Thanks for the info..Id LOVE to get headers , however Im not installing them because I dont have the time or the right tools, and after what Ive heard is required to install (moving things aside and whatnot in order to get to certain bolts) I dont trust any shop to do it, other than the fact theyd Rape me on installation ($$$). So I chose the HF's. EASY install, and Good gains, I guess.

 

I felt no difference whatsoever when I installed my KINETIX HF cats. Not to say that they didn't actually gain anything, just that I couldn't tell.

 

Just had my Kinetix HF's installed today..My butt dyno is very sensitive to change in performance, and I felt a difference,. It's more PEPPY than before, not ALOT but a noticeable difference.. I have a habit also: After adding a mod, I'll start the car, let it idle for a few secs, shut it off and reset the ECU Via TS's procedure.

 

DC Headers and high flow cats = can't say I felt anything great here on my G Sedan. Sounds a little more throaty and deep. The dyno will tell, though.

 

i have a k&n drop in and after i installed the crawford cats i definately felt a difference.....their quality is top notch, fitment is perfect and they have great customer service too....jmo....out

 

From a sound standpoint, I noticed a BIG difference with the KINETIX HF cats. With them and the stock exhaust, my car sounds like I have a Borla TD exhaust. It makes the exhaust slightly louder and a little deeper. Not great, but noticible.

 

I have the RT cats and I did feel that the car was pulling better.
Not to mention it sounds great.

With the mods I have I feel a difference over stock.
Every little mod helps.