Question about SLP long tube headers

RobertH · 11-29-2006, 07:00 PM

I have a stock 05 GT and i am thinking about buying SLP long tube headers and catted x-pipe, will it past emissions, someone tried to tell me it wouldnt but i thought it would. And other question is how much louder then stock is it without a catback exhaust system, and finally is the install easy? Im pretty much tryin to get the most power for 1300 without getting a tuner or messing with the ecu.

SlicK · 11-29-2006, 07:10 PM

It's easy as long as you know what you're doing. It will also pass emissions if you do get the catted x-pipe, but if you get an o/r pipe than it will not pass the emissions standards. As far as the sound, you can't just end your exhaust at your mid-pipes. If you get a loudmouth with all of that, you exhaust will be loud as hell. Some people have taken off SLPs because they're too loud and get annoying. Just w/e your preference is really.

RobertH · 11-29-2006, 07:17 PM

i mean will it be loud iwth a stock catback

PureStang · 11-29-2006, 07:20 PM

Quote:

Originally Posted by RobertH

i mean will it be loud iwth a stock catback

it will get louder..just not as loud as if u were to have an aftermarket catback

and if i were you, i would go w/ some other company if you can cause SLP is rediculous expensive

Codiddy · 11-29-2006, 07:47 PM

first you need to tell us what state you live in, because emissions are different in every state and in California for example long tubes won't pass emmisions no matter what.

RobertH · 11-29-2006, 08:12 PM

Texas

SLVR04GT · 12-04-2006, 12:48 PM

YES, it will pass... They don't even do emissions checks on cars newer than 98 I think. They just look for the idiot lights and all the other basics stuff. I took my car to Firestone with BBK LTs, BBK O/R X-Pipe, and Magnaflow catback. The only thing that was plugged into my car was the cable to the on board computer.

Plus, if you bought the car new, you get 2 years before it needs to be inspected.

I'm from Texas as well.

whitethunder46 · 12-04-2006, 01:04 PM

Hey man. I have SLP LT's and SLP catted X-pipe on my 01 GT.

I had a shop do it but I was there most of the time. Install with LT's is a PITA with 99-04, so I'm not sure how much better it is with the 05+. As far as fitment though, fitment was beautiful with no problems. I've had them on for about 15 months with no leaking issues whats so ever.

I got the shop that was doing my install, to become a certified dealer for SLP. This saved me about $300 off of the price of the pieces. Total was about $900 after tax for the LT's and the catted X-pipe. Install was $600 for both.

It will give a very nice sound I bet with the stock catback. Since it's a muffler'd exhaust, it should give a decent tone. IMO stay with a catted X-pipe no matter what, even if there were no emission laws. The cats help give it a nice tone, rather pure grossly loud.

Feel free to ask anymore questions.

RobertH · 12-05-2006, 10:52 AM

when i heard the first person say it would be rediculously loud with loudmouths i had to buy them

I cant find ANY shops in houston that will install the headers for me except one (overspeed motorsports) but i took my subaru to them to get a boost controller installed bc i was a car noob at the time and when i was driving home for some reason i didnt hear my turbo spool and my boost gauge wasnt working, they didnt even secure the lines that held the boost and my turbo wasnt getting any boost, so i dont even wanna try going to that place with this car. Think i could do it myself?

whitethunder46 · 12-05-2006, 01:10 PM

Quote:

Originally Posted by RobertH

when i heard the first person say it would be rediculously loud with loudmouths i had to buy them

I cant find ANY shops in houston that will install the headers for me except one (overspeed motorsports) but i took my subaru to them to get a boost controller installed bc i was a car noob at the time and when i was driving home for some reason i didnt hear my turbo spool and my boost gauge wasnt working, they didnt even secure the lines that held the boost and my turbo wasnt getting any boost, so i dont even wanna try going to that place with this car. Think i could do it myself?

Grab a buddy or two and yes. All it really is, is a simple bolt on. It's just hart to read and get in there.

*03gtmustang* · 12-05-2006, 01:13 PM

Ive got a write up on my site.

RCTrucker7 · 12-06-2006, 06:36 AM

Quote:

Originally Posted by RobertH

when i heard the first person say it would be rediculously loud with loudmouths i had to buy them.

Robert, you'll love the LoudMouths. I have them on an otherwise completely stock '05 GT, and even after about 6 months of having them, I still can't get enough of the sound. Watch for peoples heads as you're driving around, when you get them installed.

RobertH · 01-06-2007, 11:13 AM

ok so i got all my stuff, installed and everything, runs great sounds great. but last night my CEL came on, i took it in and this shop did a diagnosis for free and said it was code 430 which is a catalytic converter problem on my xpipe (which is SLP). I was told that it would not make my CEL come on and there we be no problems. Any solutions?

WaterDR · 01-06-2007, 12:01 PM

Rob:

A few things.....

1 - SLP makes great stuff.

2 - SES lights comming on after mods is nothing new. Happens all the time. Could be a problem with the install such as a leak etc.... There is a difference between sayng a code "won't" pop and a code "should not" pop. Follow me?

3 - Headers are a pain in the ass. They suck to install and are notorious for needing adjustments after you put them in.

4 - Adding LT's can cause problems with the tune. They will/can make a car run lean. IMO, installing LT's often time requires a dyno tune. You mentioned that you did not want to mess with the ECU and install headers and I don't see how the both can co-exist.

5 - The '05's ECU are very sensitive. Much more so then older years. On you car you can not even add a CIA w/o a tune modification.

6 - The industry is still learning when it comes to the new platform Mustangs.

With all that said, you need to find out why you have a code. A code stating a problem with a CAT does not mean jack. The code does not need to be read, the entire car needs to be road tested with a diagnostic device so that parameters can be datalogged. The CAT's do not have a sensor on them, so the ONLY way the ECU will think there might be a problem with the CAT is from the O2 sensor right after the CAT. Most likely it is seeing a rich signal....you car might actually be running very rich and thus the sensor thinks you have an emissions problem. I am sure that the CAT itself is fine.

I would suggest that before you pannick, go to this website:

www.modularmisfits.com

Sign up for the forum. Then place a post for a guy named Matt Hill. He is a good SCT tuner and should be able to help you out. Tell them that I sent you.

WaterDR · 01-06-2007, 12:02 PM

BTW, how does that bad boy sound? SLP makes great stuff. If you had a good-tuned ear you can hear your car running rich with that exhaust. It will tend to pop.

whitethunder46 · 01-06-2007, 01:28 PM

When I installed SLP LT's and catted xpipe on my 01, my CEL came on as well. Same problem as you. It's because the preliminary cats were eliminated and more fumes are going to the only 2 cats left. As waterdr said, the cars are very picky and sensitive. I just had my tuner turn them off with my Xcal2.

WaterDR · 01-06-2007, 01:58 PM

That would be true, I just assumed he still had both sets of O2 sensors. If he has cats, he should.

whitethunder46 · 01-06-2007, 03:05 PM

Quote:

Originally Posted by WaterDR

That would be true, I just assumed he still had both sets of O2 sensors. If he has cats, he should.

I still have both my sensor's and I still get CEL light.

WaterDR · 01-06-2007, 03:15 PM

After-market cats should not cause an SES. They work quite well. Hum....you may have an issue too. Ever had the car on a dyno?

97stanger · 01-06-2007, 04:18 PM

mine also pop on and off occasionally...

whitethunder46 · 01-06-2007, 05:36 PM

Quote:

Originally Posted by WaterDR

After-market cats should not cause an SES. They work quite well. Hum....you may have an issue too. Ever had the car on a dyno?

Yea. Ran about 6 runs last year. Shop owned by a Mustang enthusiast who owns a 10 sec. 93 Cobra N/A. Also has built/tuned a 950RWHP 04 TT Cobra.

I can't remember his full terms, but it's because the Hi-flo cats are basically too hi-flow for the sensors.

RobertH · 01-06-2007, 06:43 PM

yea well i am about go get the car dynod, im not sure that i really want to tune it yet, just because i dont have the money to fix the car if anything goes wrong, unless there is a way for them not to find out u used an SCT. I have been thinking of getting this though. not sure yet http://www.americanmuscle.com/sct-li...600-tuner.html

11-29-2006, 07:00 PM	#1 (permalink)
RobertH Junior Member Join Date: Nov 2006 Posts: 12	Question about SLP long tube headers I have a stock 05 GT and i am thinking about buying SLP long tube headers and catted x-pipe, will it past emissions, someone tried to tell me it wouldnt but i thought it would. And other question is how much louder then stock is it without a catback exhaust system, and finally is the install easy? Im pretty much tryin to get the most power for 1300 without getting a tuner or messing with the ecu.

12-04-2006, 01:04 PM	#8 (permalink)
whitethunder46 Always Detailin' Join Date: Oct 2005 Location: Dayton, OH Posts: 3,556	Hey man. I have SLP LT's and SLP catted X-pipe on my 01 GT. I had a shop do it but I was there most of the time. Install with LT's is a PITA with 99-04, so I'm not sure how much better it is with the 05+. As far as fitment though, fitment was beautiful with no problems. I've had them on for about 15 months with no leaking issues whats so ever. I got the shop that was doing my install, to become a certified dealer for SLP. This saved me about $300 off of the price of the pieces. Total was about $900 after tax for the LT's and the catted X-pipe. Install was $600 for both. It will give a very nice sound I bet with the stock catback. Since it's a muffler'd exhaust, it should give a decent tone. IMO stay with a catted X-pipe no matter what, even if there were no emission laws. The cats help give it a nice tone, rather pure grossly loud. Feel free to ask anymore questions. __________________ supernissans.net 2001 Mustang GT - Saleen Replica - SOLD 2007 Nissan Sentra 2.0S http://www.cardomain.com/ride/3022272

12-05-2006, 01:13 PM	#11 (permalink)
03gtmustang Super Moderator Join Date: Jan 2005 Location: Northern Va Posts: 3,230	Ive got a write up on my site. __________________ D&D Auto Detailing -Dan

01-06-2007, 12:01 PM	#14 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,366	Rob: A few things..... 1 - SLP makes great stuff. 2 - SES lights comming on after mods is nothing new. Happens all the time. Could be a problem with the install such as a leak etc.... There is a difference between sayng a code "won't" pop and a code "should not" pop. Follow me? 3 - Headers are a pain in the ass. They suck to install and are notorious for needing adjustments after you put them in. 4 - Adding LT's can cause problems with the tune. They will/can make a car run lean. IMO, installing LT's often time requires a dyno tune. You mentioned that you did not want to mess with the ECU and install headers and I don't see how the both can co-exist. 5 - The '05's ECU are very sensitive. Much more so then older years. On you car you can not even add a CIA w/o a tune modification. 6 - The industry is still learning when it comes to the new platform Mustangs. With all that said, you need to find out why you have a code. A code stating a problem with a CAT does not mean jack. The code does not need to be read, the entire car needs to be road tested with a diagnostic device so that parameters can be datalogged. The CAT's do not have a sensor on them, so the ONLY way the ECU will think there might be a problem with the CAT is from the O2 sensor right after the CAT. Most likely it is seeing a rich signal....you car might actually be running very rich and thus the sensor thinks you have an emissions problem. I am sure that the CAT itself is fine. I would suggest that before you pannick, go to this website: www.modularmisfits.com Sign up for the forum. Then place a post for a guy named Matt Hill. He is a good SCT tuner and should be able to help you out. Tell them that I sent you. __________________ Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump My Car My Email

01-06-2007, 12:02 PM	#15 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,366	BTW, how does that bad boy sound? SLP makes great stuff. If you had a good-tuned ear you can hear your car running rich with that exhaust. It will tend to pop. __________________ Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump My Car My Email

11-29-2006, 07:17 PM	#3 (permalink)
RobertH Junior Member Join Date: Nov 2006 Posts: 12	i mean will it be loud iwth a stock catback

11-29-2006, 08:12 PM	#6 (permalink)
RobertH Junior Member Join Date: Nov 2006 Posts: 12	Texas

12-04-2006, 12:48 PM	#7 (permalink)
SLVR04GT Member Join Date: Dec 2004 Posts: 78	YES, it will pass... They don't even do emissions checks on cars newer than 98 I think. They just look for the idiot lights and all the other basics stuff. I took my car to Firestone with BBK LTs, BBK O/R X-Pipe, and Magnaflow catback. The only thing that was plugged into my car was the cable to the on board computer. Plus, if you bought the car new, you get 2 years before it needs to be inspected. I'm from Texas as well.

12-05-2006, 10:52 AM	#9 (permalink)
RobertH Junior Member Join Date: Nov 2006 Posts: 12	when i heard the first person say it would be rediculously loud with loudmouths i had to buy them I cant find ANY shops in houston that will install the headers for me except one (overspeed motorsports) but i took my subaru to them to get a boost controller installed bc i was a car noob at the time and when i was driving home for some reason i didnt hear my turbo spool and my boost gauge wasnt working, they didnt even secure the lines that held the boost and my turbo wasnt getting any boost, so i dont even wanna try going to that place with this car. Think i could do it myself?

01-06-2007, 11:13 AM	#13 (permalink)
RobertH Junior Member Join Date: Nov 2006 Posts: 12	ok so i got all my stuff, installed and everything, runs great sounds great. but last night my CEL came on, i took it in and this shop did a diagnosis for free and said it was code 430 which is a catalytic converter problem on my xpipe (which is SLP). I was told that it would not make my CEL come on and there we be no problems. Any solutions?

01-06-2007, 01:28 PM	#16 (permalink)
whitethunder46 Always Detailin' Join Date: Oct 2005 Location: Dayton, OH Posts: 3,556	When I installed SLP LT's and catted xpipe on my 01, my CEL came on as well. Same problem as you. It's because the preliminary cats were eliminated and more fumes are going to the only 2 cats left. As waterdr said, the cars are very picky and sensitive. I just had my tuner turn them off with my Xcal2. __________________ supernissans.net 2001 Mustang GT - Saleen Replica - SOLD 2007 Nissan Sentra 2.0S http://www.cardomain.com/ride/3022272

01-06-2007, 01:58 PM	#17 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,366	That would be true, I just assumed he still had both sets of O2 sensors. If he has cats, he should. __________________ Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump My Car My Email

01-06-2007, 03:15 PM	#19 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,366	After-market cats should not cause an SES. They work quite well. Hum....you may have an issue too. Ever had the car on a dyno? __________________ Black 2000 GT Vert: Novi-2000 with Intercooler (375rwhp @ 9 psi); Tune by Kauffmans; Roush 380R Body kit; Steeda Subframes; Steeda Strut Tower Support; Deep Dish Bullets; FRPP 4:10's; SCT 4 Position Chip with four custom tunes; Steeda CAI; C&L Pleum; BBK 75 TB; SLP Loudmouth; SLP Catted X-Pipe; Bullitt Suspension; UPR Conrol Arms; Focus Fuel Pump My Car My Email

01-06-2007, 04:18 PM	#20 (permalink)
97stanger Senior Member Join Date: Jul 2005 Posts: 498	mine also pop on and off occasionally... __________________ Blown stock AODE tranny...Built racing auto tranny with 3500-3800 converter coming soon.

01-06-2007, 06:43 PM	#22 (permalink)
RobertH Junior Member Join Date: Nov 2006 Posts: 12	yea well i am about go get the car dynod, im not sure that i really want to tune it yet, just because i dont have the money to fix the car if anything goes wrong, unless there is a way for them not to find out u used an SCT. I have been thinking of getting this though. not sure yet http://www.americanmuscle.com/sct-li...600-tuner.html

01-06-2007, 07:08 PM	#23 (permalink)
WaterDR Administrator Join Date: Sep 2004 Posts: 6,366