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#1 |
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Newbie
03 GT
Join Date: May 2008
Location: NJ
Posts: 44
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stock h-pipe mod?
would removing the rear resonators/pre-cats make the car any louder or free up any power??
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03 GT- Accufab 70mm TB & Plenum...CAI...Flowmaster 40's...O/R Prochamber...MM ST Brace...SCT X3 Bama Race Tune...Work in Progress |
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#2 |
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Enthusiast
2001 Mustang GT
Join Date: Jul 2009
Location: Albany
Posts: 552
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yea both, a little bit..
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#3 |
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Too Soon, Junior!
03 GT Vert
15:43.28@25.21 Too many naked bitches in the back
Join Date: Jul 2009
Location: Columbus, OH
Posts: 3,694
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Are you referring to the mufflers or the cats?
I think removing either one would give you a bit more sound and power, though removing the cats would make the biggest difference.
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![]() 03 GT - Scrapes on lane markers - Modded 02 Cougar - Able to clear most speed bumps - Some mods 01 Explorer - Parking blocks NOM NOM NOM - Stock |
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#4 |
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Newbie
03 GT
Join Date: May 2008
Location: NJ
Posts: 44
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im referring to the rear "cats"..i live in NJ and im worried about going catless...
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03 GT- Accufab 70mm TB & Plenum...CAI...Flowmaster 40's...O/R Prochamber...MM ST Brace...SCT X3 Bama Race Tune...Work in Progress |
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#5 |
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El Danno
2004 Mustang GT
12.35@114.08 w/ 1.88 60'
Join Date: Feb 2009
Location: Waterloo, IA
Posts: 7,001
Blog Entries: 2
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If you don't have emissions, but an O/R midpipe. If you have to pass emissions get a catted midpipe, they should be high flow cats. It'll make a hell of a difference in sound, a little bit of power. The mid-pipe is the biggest choking point of the stock mustang exhaust.
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#6 | |
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Penetration before detonation
2001 Mustang GT
13.85 @ 100.5 w/3800 ft. DA
Join Date: Jan 2008
Location: Daytona Beach, FL
Posts: 2,163
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Oh, DCook, I think you meant "buy," not "but." |
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#7 |
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I Post Entirely Way Too Much
Blown 03 GT
Join Date: Jun 2007
Location: Long Island NY
Posts: 6,214
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If your gonna remove the rear cats, you may as well look into a set of high flow cats and replace all 4.
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#8 |
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Regular
2002 Mustang GT
Join Date: Oct 2009
Location: So Cal
Posts: 431
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I wanna run an aftermarket mid pipe but being in Cali and having the smog nazis enforcing all these rules it might be hard to do. I was thinking of going with the MRT catted h but there pretty damn expensive.
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#9 |
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Enthusiast
Join Date: Mar 2009
Location: dallas
Posts: 674
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u can get a catless h-pipe for like $150 and then when emissions come up, swap ur stock pipe with cats back on. its like a 20 minute ordeal...
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#10 |
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Regular
2002 Mustang GT
Join Date: Oct 2009
Location: So Cal
Posts: 431
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Only problem i'd have with that is the random road side emissions tests California has. I'd be fucked if i was pulled to go in there. And i've seen it happen in my city, a route i take to work is just one of the streets they use to do these tests. It's ridiculous
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#11 |
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Regular
"2k GT"
13.9
Join Date: Jul 2007
Location: RGV
Posts: 165
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I just had that done to my car, they removed all 4 cats, and welded 2 dummy cats on straight pipes, all this done on the stock h pipe.
Heres a few follow ups: a) The MIL lit up 2 weeks after the mod. b) It got louder about 20x more, and since i use SLP LM1.. well it gets pretty crazy. c) You can smell exhaust fumes alot more. I live down south Texas, Rio Grande Valley to me exact, where 80% of teenagers have either modded camaro's firebirds or mustangs lol.. oh or pickups. Cops don't really care about those mods.
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2k Silver Gt. SLP LM1 + Straight Pipes/custom hpipe. Ford Racing 3.73's. Custom CAI. - 13.9 |
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#12 |
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Hardcore Enthusiast
2002 Mustang GT
13.4@101 wheel spin
Join Date: Jul 2009
Location: Orange Grove,TX
Posts: 1,329
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I'm down in south texas as well by corpus christi...I'm catless with cherry bomb's on the stang and my old K5 blazer is totaly straightpipe :-) so fuck the cops...lol but if u have emission nazi's like in cale ur best bet is a hi flow catted H cause when you remove those 2 cat's you may not be able to pass then your totaly ef'd in the ay bro... That would suck ass...
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02 GT K&N CAI no cats FRPP drop diablo programmer cherry bomb mufflers MGW short throw shifter TFS UDP's 3.73's... Looking into some shorty headers upper intake got a 75mm tb waiting ... Ironhorsemotorsports.com for all your ford needs! |
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#13 |
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Newbie
03 GT
Join Date: May 2008
Location: NJ
Posts: 44
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i never thought of that.......good idea
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03 GT- Accufab 70mm TB & Plenum...CAI...Flowmaster 40's...O/R Prochamber...MM ST Brace...SCT X3 Bama Race Tune...Work in Progress |
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#14 |
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Regular
"2k GT"
13.9
Join Date: Jul 2007
Location: RGV
Posts: 165
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Heres kind of a demo sound of what a stang would sound like with straight pipes, xept SLP LM1. sound quiality isnt the greatest but you get a general idea..
i recorded it today at my friends house, i hope it helps..
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2k Silver Gt. SLP LM1 + Straight Pipes/custom hpipe. Ford Racing 3.73's. Custom CAI. - 13.9 Last edited by Mathos1; November 4th, 2009 at 01:48 AM. |
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#15 |
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MM Fanatic
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i had my back 2 took off, and i barley notice any difference ,but when i took the front 2 off,yeah baby
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#16 |
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Hardcore Enthusiast
2001 Mustang GT
8.9@78
Join Date: Jul 2007
Location: DFW Texas
Posts: 1,923
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IMO i would not start hacking your stock mid pipe and piecing in other parts. Just buy a o/r or a high flow cat mid pipe. It can get kinda.."ghetto" hacking parts.
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Fire it up, burn it down.
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#17 | |
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I Post Entirely Way Too Much
Blown 03 GT
Join Date: Jun 2007
Location: Long Island NY
Posts: 6,214
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Dont they just look the car over with those? They wont cant see you have no cats.
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#18 |
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Regular
2003 Mustang GT
Join Date: Dec 2007
Location: Waldwick & Freehold NJ
Posts: 177
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from a fellow nj guy... get a catless one and when inspection rolls around swap it out like liljojo said. plus from what ive seen there are no road side emissions checks here in jers
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#19 |
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Hardcore Enthusiast
97 Mustang GT
slower than the speed of smell
Join Date: Feb 2008
Location: rochester hills, MI
Posts: 2,224
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id say screw the cops and get the o/r pipe and keep the stock pipe for emissions. if they give you any grief about it and have to go to court just switch it out and problem solved
oh but dont they have that new law in cali now that your not allowed to use any aftermarket on your car? god cali is such a shit state for cars
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#20 |
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Enthusiast
Join Date: Mar 2009
Location: dallas
Posts: 674
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haha i didnt know they have roadside shit in cali.... that sucks. just get a catted high flow h-pipe and be done with it.
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