Hp Difference Between Hi Flo Cats And No Cats?

[98sqstang]

I was wondering if anyone has actually tested HP difference between X or H pipes with hi flo cats versus off road pipes with no cats. I have a 98 Cobra and was wondering if the swapping for emissions testing is the worth the exta Hp you get from a pipe with no cats or having one with cats that can stay on all the time..

 

[WRXracer]

yeah

probably a 10 hp differnce..

 

[mrvax]

I would think even less with good hi-flows. Maybe 5.

 

[DavidCroft]

I wouldnt even try hi flow cats. First of all they are like $400 a piece. My H-pipe shipped to my door was like $130. Smells like a motor boat, and have to go to the south side of town for inspection, but hey, why pay more for less?

 

[ADRENLN]

i thought the same thing pay less and get more hp. however im switching back to a pipe with cats because of the smell and mostly the cops here in nj, i get pulled over too much. so i ts winding costing me alot more to do it this way. i dont think it will be that much different prob. 5 hp.

 

[millatime]

I wouldnt even try hi flow cats. First of all they are like $400 a piece. My H-pipe shipped to my door was like $130. Smells like a motor boat, and have to go to the south side of town for inspection, but hey, why pay more for less?

the carsound (magnaflow) cats sell for 31.50 each on ebay

 

[StangJonGT]

It depends on your modifications. The more radical your engine combo, the more restrictive the cats become. As for bolt-on or mostly stock, the difference is truly negligable, from what I've read. Oh and make your own; hi-flow cats are cheap on ebay, as millatime pointed out.

Jon

 

[AMMOstang]

I have the bbk x-pipe with high flows (gutted). the only difference i felt before gutting (due to broken stone thingy inside cat) and after was that the car seemed to pull a little harder on the interstate at 80mph in 5th after gutting them.


edit: also after is quite a bit louder

 

[5spd GT]

I lost a tenth with the addition of the Prochamber...

David

 

[ADRENLN]

the prochamber has no cats, right? how did you loose a tenth?

 

[wms004]

I wouldnt even try hi flow cats. First of all they are like $400 a piece. My H-pipe shipped to my door was like $130. Smells like a motor boat, and have to go to the south side of town for inspection, but hey, why pay more for less?

My x pipe has 2 highflow cats and was shipped to my door for 379.. high flow cats are not 400 a piece.. www.magnaflow.com you can order carsound high flow cats

-wade

 

[5spd GT]

the prochamber has no cats, right? how did you loose a tenth?

I lost a tenth from my time (13.9 to 13.8 for EX)...yes there is no cats...