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Discussing stock h-pipe mod? in the 99-04 Forum. would removing the rear resonators/pre-cats make the car any louder or free up ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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#1 |
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Newbie
03 GT
Join Date: May 2008
Location: NJ
Posts: 12
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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...MM ST Brace...Work in Progress |
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#2 |
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Regular
2001 Mustang GT
Join Date: Jul 2009
Location: Albany
Posts: 188
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yea both, a little bit..
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#3 |
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Regular
02 GT Vert
15:43.28@25.21 Too many naked bitches in the back
Join Date: Jul 2009
Location: Miami
Posts: 202
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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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Going in as soon as I find a jacked bald guy to sit in my car to tell me I'm granny shiftin' and not double clutchin' like I shouldDon't want your 75 shot jets anymore? PM me and I'll buy them. Size 40 & 26 |
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#4 |
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Newbie
03 GT
Join Date: May 2008
Location: NJ
Posts: 12
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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...MM ST Brace...Work in Progress |
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#5 |
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Hardcore Enthusiast
2004 Mustang GT
Join Date: Feb 2009
Location: Cedar Falls, IA
Posts: 1,007
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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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Enthusiast
2001 Mustang GT
13.85 @ 100.5 w/3800 ft. alt.! F***ing A!
Join Date: Jan 2008
Location: Daytona Beach, FL
Posts: 518
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Oh, DCook, I think you meant "buy," not "but." |
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#7 |
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Hardcore Enthusiast
Blown 03 GT
Join Date: Jun 2007
Posts: 2,624
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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: Los Angeles, CA
Posts: 72
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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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Regular
Join Date: Mar 2009
Location: dallas
Posts: 233
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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: Los Angeles, CA
Posts: 72
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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: 160
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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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Enthusiast
2002 Mustang GT
not sure yet :-(
Join Date: Jul 2009
Location: Orange Grove,TX
Posts: 907
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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...coming soon LT headers and 3.73 gears and some sort of a supercharger |
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#13 |
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Newbie
03 GT
Join Date: May 2008
Location: NJ
Posts: 12
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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...MM ST Brace...Work in Progress |
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#14 |
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Regular
"2k GT"
13.9
Join Date: Jul 2007
Location: RGV
Posts: 160
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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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Hardcore Enthusiast
2000 mustang gt
Join Date: Oct 2007
Location: vansant,va
Posts: 2,661
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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: 1,384
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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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#17 | |
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Hardcore Enthusiast
Blown 03 GT
Join Date: Jun 2007
Posts: 2,624
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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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Enthusiast
1997 Mustang GT
Join Date: Feb 2008
Location: lansing, MI
Posts: 897
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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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Regular
Join Date: Mar 2009
Location: dallas
Posts: 233
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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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