So when we picked up our 96 Cobra the seller threw in the h-pipe I posted below.
I was wondering what the opinions were on whether or not I should reinstall it. Right now we're getting an 02 censor and misfire codes which he claim came about when he put the pipe on. He then took it off, but we're still getting the codes anyhow, so I'm thinking if I'm going to do it maybe I'll do it now.
the code has nothing to do with the pipe he reinstalled the old one because of the cats. if you have smog testing in your area . the H off road pipe will not pass. you have other problems
__________________
1988 coupe race car 2700lbs 366rwhp
1965 2+2 fast back 4 speed tri power
1968 gt/cs 347 5 speed
1970 mach 1 428scj 4 speed v code 410 rwhp stock
1990 gt drag car 780hp on motor
1994 gt, 1998 svt cobra
2003 svt cobra 456rwhp
Ok thanks..... But i know i need the cats to inspect it but should i put that h-pipe on or is it going to make the car run worse?? And if i could find out how to keep the check engine light from going on when or if i install it!!!!
thats not why ur engine lite is coming on. i have LT headers on mine with hi flow cats. Is there a place in the h pipe for o2 sensors? There should be. The reason the guy took it off is so it will pass. He cant sell it if it wont pass.
__________________
1988 coupe race car 2700lbs 366rwhp
1965 2+2 fast back 4 speed tri power
1968 gt/cs 347 5 speed
1970 mach 1 428scj 4 speed v code 410 rwhp stock
1990 gt drag car 780hp on motor
1994 gt, 1998 svt cobra
2003 svt cobra 456rwhp
The code would still be stored in the ECU after the cats were put back on,that why the CE light is coming on, you need to clear to codes,get a new pair of O2's,and HELL YES re-install the O/R H, it will NOT hurt anything, it'll have less backpressure and more top end power! A couple options to keep the CE lite off when running an HPipe, get Mil eliminators or a hand held tuner (Predator, SCT Xcal) so you can have a custom tune loaded into your ECU that turns off the O2's
Hey George; I don't know much about New York State inspection laws, but if their law states that you should run cats to pass vehicle inspection. Then I would run a free-flowing catted X pipe, it will scavenge the gasses much better then an H pipe. An H pipe is nothing more, then a balance tube and as far as MIL Eliminators they don't last very long before you get that code popping back up on you again. Magnaflow or Bassani make excellent free-flowing catted X Pipes, with good free-flowing cat backs exhaust systems. I have a 96 SVT Cobra Convertible, which is very heavily modded there is a very long list of parts all forged placed into a Tecksid Aluminum Block that's all reinforced in the right places. Other then the custom made Doug Thorley headers, the rest of the exhaust is Bassani with a catted X pipe and the car made 402rwhp, and 418rwtq. the last time I tuned and dynoed the car. And this is N/A, not forced induction, or definetly not on any bottle this is all motor and a lot of money. I've been working on Mustangs, for over forty years and evryone has their own opinions as you can see. Whatever you decide, just make sure you do your research first, Mike. SCT Tuner.
Nice numbers mike, getting over 400 N/A is impressive, some serious head, intake, and cam work had to be done to achieve that number! When your talking about a NA Cobra with a couple boltons you'll see NO difference on the Dyno between an O/R H and X, a couple HP one way or the other, I personally HATE the sound off O/R X's and many feel the same way, Tinny, like marbles are rattling inside the pipes. Mike you don't seem to be a Big fan of the H-Pipe? All I know is there's plenty of 800+ HP Whipple Cobra's out there running Long Tubes with shorty O/R H Midpipes! When I install LT's that'll be the route I'll take
Bassani does make nice systems But damm the prices are Steep! Their catted X is over $500!
yeah and their high flow cats are expensive to!!!!! BUT they do make the car sound better without having to eliminate the cats.
Forum Jump
User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Mustang Forums 2005 + Mustang 2005+ Talk 2005+ Mustang GT Tech 2005+ Mustang V6 Tech Mustang GT500 2010 Mustang S197 Mustang Pictures 4.6 Mustang 4.6L Talk 4.6L Tech 5.0 Mustang 5.0L Talk 5.0L Tech 94-95 Tech V6 Mustang V6 Talk V6 Tech 2005+ V6 Tech 2.3 and SVO Mustang 2.3L Talk 2.3L Tech Mustang II Mustang II Talk Mustang II Tech Classic Mustang Classic Talk Classic Tech SVT Cobra Mustang SVT Cobra Talk SVT Cobra Tech Mustang Tech Audio & Alarms Power Adders Show & Shine Wheels and Tires Fuel Economy Racing Forums Drag Racing Road Racing Regional Forums United States West Coast Mid West West Central East Central New England Mid Atlantic SouthWest SouthEast Canada Canada West Canada East Mexico and Latin America Mustang Club Mexico AC Clasicos 1964-1973 Modernos 1974-2007 Modificaciones Australia/New Zealand Europe Sponsor Forums AmericanMuscle Brenspeed CruizinConcepts GrandDesignMat HillBank Motorsports HotPart Latemodel Restoration Supply MGP Caliper Covers MossMuscle PerformancePartsInc Stang Mods SpencerPerformance Tillman Speed Velocity Turbo Systems Community Forums News and Announcements Introductions Shoot The Breeze Mustang Lounge Fun Zone Hot Zone Kill Stories Power Polls Registries Mustang Clubs Support Forums Multimedia Support Site Support Suggestions Feedback Test Area Problem and Bug Reports
i have LT to a hi flow x pipe and it sounds awesome. Not to loud and legal some what. If you goto the right smog guy they will pass it
__________________
1988 coupe race car 2700lbs 366rwhp
1965 2+2 fast back 4 speed tri power
1968 gt/cs 347 5 speed
1970 mach 1 428scj 4 speed v code 410 rwhp stock
1990 gt drag car 780hp on motor
1994 gt, 1998 svt cobra
2003 svt cobra 456rwhp
He probably has a cat but a really small one thats just legal. I heard of somthing im not sure what its called but its only one little screen thats in the exhaust which they considered a cat.
Hey noreast, before you even spend a penny on new O2"s or even getting a diagnostic anywhere, try leaving battery unplugged for a few hours to clear out the MIL code's on the computer. An if it come's back on than you may need to address something.
Maybe the previous owner was cruising with the o/r pipe tripping "catalyst efficiency below threshold" code's, an never drained the ECU after putting the cat pipe back on. Who knows, may help, maybe not ? ?
To H-Pipe or Not? 96 Cobra 
Ok thanks..... But i know i need the cats to inspect it but should i put that h-pipe on or is it going to make the car run worse?? And if i could find out how to keep the check engine light from going on when or if i install it!!!!
. 
