cons with off road h pipe?

[03redfiregt]

I'm going to be getting a mrt h pipe in thte spring but i cant decide if i want the catted or non catted. I want the cats because i don't want to have a problem getting a sticker but i want a good muscle car sound. whats is the sound difference between an off road and catted. ?

 

[94Gtstock-newclutch]

alot. no cats are way louder. a con of no cats is lost low end torque

 

[Darkhorse845]

True and a huge loss of back pressure with isn't good!

 

[Blk01gt_]

whoops, didn't notice this thread before i made mine, basicly the exact same question!

So is the catted H-pipe a better option, or is the O/R better? I want LOUD, but i dont want to lose a ton of performance.

 

[twogts4us]

I dunno if I'd call it THAT much of a sound difference - had both on the 01 (which is now catted), but it really wasn't that much louder.
My MRT catted H is on the way...and we don't have emmissions testing here anymore, but I hate the smell on non-cats. Oh yeah, it's cool every once in a while...and I love the smell of the track...but living with it everyday is another thing.

 

[stang74]

off road mrt h pipe here and flowmaster catback, I went from MRT catted to o/r, no low end loss noticed, but I have 4:10s

 

[spikeGT_99]

no cats will make more power, and better times, only reason to get cats is if u gotta pass emissions or u dont want it to be loud

 

[merc123]

My MAC O/R H-pipe made a huge difference in sound. The 2k RPM bass tone I had from my Dynomax mufflers is so much louder now and the overall sound is louder. I should have a comparison video up in a few days showing my stock H vs. O/R H.

The low end torque isn't all that much. From a 10MPH roll I was dead even with a 5.0 that I was dead even with before my O/R H. The 60+ though is amazing. I can hit 90 like nothing now. I have to watch my speed more now than before the O/R H.

 

[propellerhead]

Man, I was sure I was gonna get an offroad H or non-catted ProChamber but it's gonna cost me some low end torque, I think I'll go with cats. I like my torque. I do 99% of my daily driving at part-throttle.

 

[Red03Mustang]

I'd get one with a couple of high-flow cats. You'll be slightly quieter and still get great performance without much torque loss. Some backpressure is a good thing!

 

[merc123]

Man, I was sure I was gonna get an offroad H or non-catted ProChamber but it's gonna cost me some low end torque, I think I'll go with cats. I like my torque. I do 99% of my daily driving at part-throttle.

Go non-catted. You will not regret it. The torque isn't enough to notice. Besides, even at part throttle you can tap the gas and you will lift the nose. The throttle reponse is so much quicker now. It seems to rev faster.

 

[flashstang04]

I dont know about you guys but when I had my o\r H every time I had to drive more than a few miles I would be able to smell exhaust fumes on my clothes. Something to think about if you are going to be on a date!!

 

[propellerhead]

I dont know about you guys but when I had my o\r H every time I had to drive more than a few miles I would be able to smell exhaust fumes on my clothes. Something to think about if you are going to be on a date!!

I'm glad you pointed this out. My car is my daily driver. Thanks.

 

[Blk01gt_]

I dont know about you guys but when I had my o\r H every time I had to drive more than a few miles I would be able to smell exhaust fumes on my clothes. Something to think about if you are going to be on a date!!

Is the smell really that bad? It's coming out of the back of the car anyway, so why would you smell it so much? Especially if you are moving forward. My car is a daily driver too, so i dont want it to be unbearable.

 

[04azuremach]

It doesn't smell that bad... I feel no loss of low end torque.. in fact the car seems to spin tires more easily now. My 60' has gotten better if anything after getting the X pipe... probably due to me learning to drive.. not the x pipe

I gained 4.5 mph in the 1/4 with it

 

[Blk01gt_]

Hmm...this seems all too familiar to the classic 3.73 vs. 4.10 debate, lol.

You have the guys with 3.73's saying 4.10's aren't drivable, and the guys with 4.10's saying they wouldnt want anything else. I figured "hey, you only live once!" and went with the 4.10's. Boy am I glad I didn't fear the gear!

I think I'm gonna have to use that same philosophy here, and "not fear the no cats"...hah.

 

[DarkFireGT]

i love the smell of no cats

i can almost guarantee that if you're sitting on the fence about which to get, you'll regret getting the catted version.

 

[Bill9000]

whoops, didn't notice this thread before i made mine, basicly the exact same question!

So is the catted H-pipe a better option, or is the O/R better? I want LOUD, but i dont want to lose a ton of performance.

Well here;s my 2 cents...

I had a '00 GT and I left the Cats in and put 2-chamber flowmasters which are supposed to be loud, and it had a really healthy, deep tone, but was far from loud... it was barely louder than stock.

I am currently installing my new 1-chamber flowmasters on my '97 GT and hopefully it will be lots louder, and still deep sounding.

hopefully this helps!

 

[boomshack]

Well the aftermarket catted pipes will wake up your exhaust plenty compared to the stock ones. The aftermarket ones have 2 high flow cats compared to 4 or 6 regular cats, so you will hear and feel the difference. I too am on the fence but passing emissions (non visual) without having to put the stocker back on is a plus if you have emissions in your area. if no emissions, then I would consider keeping your car somewhat civilized around town...in other words, keep your cats......aaaaaah damnit, now I'm on the the O/R side of the fence again...I think I'm just gonna get the O/R myself and be done with it...it's ssssoooo cheap compared to the catted ones you know.

 

[propellerhead]

This is me on the fence again... argh!

I think a catted-H will be lots of improvement over the stock H, especially with my Mac 2.5 in catback.

Pro: A little more power gain + a little more loudness for a non-cat... is it worth the emissions trouble?

Con: Smelly exhaust + emissions testing hassles for a non-cat... is it worth the extra power/loudness gain?

Right now, I'm leaning towards the catted mid-pipe.