Currently I have ceramic coated shorty headers installed. I am thinking about changing my headers to longtube headers. My question is, do longtube headers provide more horsepower than shorty headers? Also (anyone from Cali who have longtubes), can the car be smogged, in particular for Calfiornia, with longtube headers. Will I need to retune for the longtube headers if already tuned for shorty headers? Just curious, so any advice or information would be appreciated. Thanks.
I don't know of any longtube headers with a CARB Exemption # making them smog legal for our cars in CA. (I am assuming you are talking about 05+ mustang?) JBA Cat4ward headers do--but they are shorties.
I went with a long tube header with 1.75 primary pipe (which I would consider if you have a power adder), and an x-pipe with high flow cats---a mod that was well worth it IMO over the stock exhaust. Keep in mind though, I realized a significant difference from the stock exhaust because it was definitely the weakest link when I was on the 150 shot N20.
Since our cars are new, I believe the first emissions test is in 6 years. The problems I have heard about are people running no cats--which makes the car quite a bit louder, and attracts the wrong kind of attention.
__________________
Paul
Daily driven 2005 GT AUTO - Whipple @ 16psi - 577 rwhp 519 rwtq
Best 1/8th mile: 6.740 @ 101.56 mph with a 1.431 60' time
Best 1/4 mile: 10.672 @ 128.42 mph with a 1.480 60' time Special thanks to:
ST Motorsports, San Bernardino CA - built engine and tune
Larry's Transmission, Corona CA - built 5R55S
M&H - 325/45/17 racemaster drag radials
GI Joe - 8 rib pulley kit
Thump_rrr - billet tensioner
Yes, I am refering to a '05 Mustang GT. I am going to have to check out the requirement for smog. I was under the impresson a new car has either 2 or 3 years before requiring testing. I have not heard of a time period of 5 or 6 years. I never own a car long enough to worry about smog. But since I plan on owning my Stang for 30+ years, this smog thing may be worth looking into.
Yes, long tubes make significant increase over shorties.
You definately will need a re-tune.
YOu car may pass the sniffer, but visual will fail... you will be moving your cats if you keep them. My JBA headers have a Carb number on them, but the law states you can't moidify your emissions system, including relocating the Cats.
__________________
2006 Mustang GT in Torch Red
C&L Intake, Evolution Performance Tune, Borla Axle Backs, Hurst Shifter, 4.10's, JBA Long Tubes, Prothane Engine Mounts, Steeda UDPs, FRPP Charge Motion Delete Plates
Yes on the power... guessing +15 RWHP catted, ~20 OR. Which both are (as you know) allot for one single mod...
No CARB# ones, the cats have to be moved aft so I think there is no way to make it legal and certified? You'll just have to keep the stockers and swapp for your test... not a fun swapp so I'd sugest getting an AM K-member, mounts, etc. to make more room for an easier swapp...
You don't need a tune to run safe, but it is always optimal... plus if you go cat-less you'll need to tune off the aft oxy sensors...
__________________
KJ, poorer but happier
Thanks to: Modular Depot Fox Lake Racing Tunable Induction Power House 411 Sun Coast Creations
LTs are an absolute no-no in California. Would never pass a visual inspection (at a legitimate shop). I drove my car for a week with no tune adjustment after the install. It was horrible.
I ran my catted Kooks on Dougs Racer tune and Brent's 93 tune for about two weeks without any adjustments. Car ran fine. I then re-tuned due to CMVC delete plates. I did ask both of them if it'd be O.K., and they said yes, as long as they weren't O/R.
__________________
12.4 @ 111mph
Saleen S/C, Thump Tensioner, BGG 8 Rib, Kooks, Stingers, Gords, 4.10, Spec 3+, Pro 5.0, GT500 FPs, GT500 T/B, Ultralite Springs, DSpecs, Prothane Mounts, BMR - Adj. Panhard Bar, LCAs, LCA Relo Brackets, Adj. UCA, Rear Sway, Sway Delete/Rad Support
Hhhhmmm...how bad do I want them? I first need to verify when my car is due for a smog test. If I have another couple years, then maybe it may be worth while to do the swap prior to the test. If I go that route, I may simply remove the cats altogether.
Sorry, but like I said, mine have a Carb number on them. C.A.R.B # D-216
See pic
What model # are those headers? I went to the JBA site and the only ones they are showing emissions legal is the Cat4ward headers, which are shorties. Maybe they haven't updated their website?
I looked all over for long tube headers with a carb exemption # a couple of months ago, but found nothing. Here is the link to their long tube, which they say is not emissions legal, off road only.
If your vehicle is six years old or newer, you will be charged an annual smog abatement fee when you register your vehicle rather than being required to provide smog certification. However, the six-year-or-newer rule doesn't apply to nonresident and custom-built cars made since 1976. Those vehicles will still require smog certification. If you have a custom or specially constructed car, however, you might need a different type of smog certification.
I wanted to check that to make sure, because that is what I was told before buying my LT's. By 2011, my 2005 will probably be at the track more then on the road anyway....but remember, if you get pulled over for "whatever", you could easily get a ticket for modified exhaust, which is one of the reasons why I opted for the catted system. The hi-flow cats are pretty good these days and also I don't have to worry about pissing off the neighbors at 6am....
__________________
Paul
Daily driven 2005 GT AUTO - Whipple @ 16psi - 577 rwhp 519 rwtq
Best 1/8th mile: 6.740 @ 101.56 mph with a 1.431 60' time
Best 1/4 mile: 10.672 @ 128.42 mph with a 1.480 60' time Special thanks to:
ST Motorsports, San Bernardino CA - built engine and tune
Larry's Transmission, Corona CA - built 5R55S
M&H - 325/45/17 racemaster drag radials
GI Joe - 8 rib pulley kit
Thump_rrr - billet tensioner
mrV: You should do it, they are a source of awesome power, better sound, and looks, know how you're about the bling... just remember that the install takes a good 3-4, maybe 5, hours on a lift... $800-1000 to have them swapped (both ways) everytime you have to go in, or many hours of knuckle busting in your driveway... I wonder how much the BMR K-mem helps with the swap??
Kyle; if they're LTs I stand corrected, thanks!
__________________
KJ, poorer but happier
Thanks to: Modular Depot Fox Lake Racing Tunable Induction Power House 411 Sun Coast Creations
mrV: You should do it, they are a source of awesome power, better sound, and looks, know how you're about the bling... just remember that the install takes a good 3-4, maybe 5, hours on a lift... $800-1000 to have them swapped (both ways) everytime you have to go in, or many hours of knuckle busting in your driveway... I wonder how much the BMR K-mem helps with the swap??
Kyle; if they're LTs I stand corrected, thanks!
I still have a couple of scars from when I installed mine.
Yes on the power... guessing +15 RWHP catted, ~20 OR. Which both are (as you know) allot for one single mod...
No CARB# ones, the cats have to be moved aft so I think there is no way to make it legal and certified? You'll just have to keep the stockers and swapp for your test... not a fun swapp so I'd sugest getting an AM K-member, mounts, etc. to make more room for an easier swapp...
You don't need a tune to run safe, but it is always optimal... plus if you go cat-less you'll need to tune off the aft oxy sensors...
On most h/f catted apps there's only about a 2hp diff detween catted and race pipes. Almost not worth breathing the extra exhaust fumes!
mrV: You should do it, they are a source of awesome power, better sound, and looks, know how you're about the bling... just remember that the install takes a good 3-4, maybe 5, hours on a lift... $800-1000 to have them swapped (both ways) everytime you have to go in, or many hours of knuckle busting in your driveway... I wonder how much the BMR K-mem helps with the swap??
Kyle; if they're LTs I stand corrected, thanks!
Yes, mine are long tubes, purchased as a kit with a Catted H-pipe. Possibly that is the difference, that I purchased them as a kit. I understand that given the law regarding moving the cats, they shouldn't gert a CARB tag, but there it is.
Oh and install take about 13 hours the first time on jack stands in the driveway. Then about 8 the second time around when you know what tools you need to reach each bolt and what needs to be removed and what doesn't
__________________
2006 Mustang GT in Torch Red
C&L Intake, Evolution Performance Tune, Borla Axle Backs, Hurst Shifter, 4.10's, JBA Long Tubes, Prothane Engine Mounts, Steeda UDPs, FRPP Charge Motion Delete Plates
Yes, mine are long tubes, purchased as a kit with a Catted H-pipe. Possibly that is the difference, that I purchased them as a kit. I understand that given the law regarding moving the cats, they shouldn't gert a CARB tag, but there it is.
Oh and install take about 13 hours the first time on jack stands in the driveway. Then about 8 the second time around when you know what tools you need to reach each bolt and what needs to be removed and what doesn't
I think it took me almost 10 hours on jackstands. Never, never again! I'll pay the $600 to get them installed next time.
2005 Mustang GT Long Tube header question 
