Straight Pipe????/ - Chevy and GMC Duramax Diesel Forum

01-04.5 LB7 Performance Parts Discussion Discussion of Performance Parts For the 01-04 LB7 Duramax Trucks No Advertising

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post #1 of 60 (permalink) Old 10-11-2007, 05:22 PM Thread Starter
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Straight Pipe????/

i was wondering if i just put a pipe in to replace the cat and muffler will the check engine light come on??

2004.5 CHEVROLET 2500HD
4 DOOR
LONGBOX
6.6L LLY DURAMAX
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post #2 of 60 (permalink) Old 10-11-2007, 05:57 PM
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No you won't get a check engine light, I have my 03 lb7 straight piped and haven't had a problem. It screams!!
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post #3 of 60 (permalink) Old 10-11-2007, 05:58 PM
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Also on the year truck you have there aren't any cats on it because the emissions control didn't become so strict until 04.
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post #4 of 60 (permalink) Old 10-11-2007, 10:13 PM
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There is a possibility it could come on. Alot of time it wont come on untill you add a cat delete and a intake. I think the newer ones are more touchy than the older ones but as far as I know all duramaxs have cats.

Honestly, my SES light came on maybe 4-5 times? It came on once when I first did it and then goes out after a day or two. Came on a few times after that but I havent seen it in months!

Jason
2006 Silverado 2500HD LBZ CC SB
Exterior: Escalade Handles, Front windows tinted to match the rear, painted bumpers & mirrors, billet grille, 305/50/20 Cooper Zeons on BMF Novakanes Death Metal, Cognito Braces, Stainless Sleeves, Train Horns
Interior: 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges, Aeroforce Interceptor Gauge, LED Lows & Fogs, Painted accents
Performance: EFI Live Tuned by Blackout Performance, Custom Blackout Performance S475 over stock twins, 45 over stock injectors, MBRP Turbo Back Stainless Exhaust (Straight piped), Raptor Lift Pump, AFE Filter, GMAX6 kit with Suncoast 1057 converter installed by Blackout Performance
1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
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post #5 of 60 (permalink) Old 10-12-2007, 01:07 PM Thread Starter
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it wont affect drivability will it??? im planning to do this right before a 1000 mile trip.

2004.5 CHEVROLET 2500HD
4 DOOR
LONGBOX
6.6L LLY DURAMAX
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post #6 of 60 (permalink) Old 10-12-2007, 04:57 PM
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From what I have read, no. You sure you have a cat? I don't think you do, so you should thow no codes. I didn't when I did my 04 LB7 (I didn't have a cat).

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post #7 of 60 (permalink) Old 10-13-2007, 09:40 PM
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Quote:
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it wont affect drivability will it??? im planning to do this right before a 1000 mile trip.
No it wont effect driveability at all. It helps out with fuel mileage a little. Some say you get horrible moan but I drivin mine 1600 mile round trip and towing alot without any complaints by me..... Other drivers on the other hand.......

Jason
2006 Silverado 2500HD LBZ CC SB
Exterior: Escalade Handles, Front windows tinted to match the rear, painted bumpers & mirrors, billet grille, 305/50/20 Cooper Zeons on BMF Novakanes Death Metal, Cognito Braces, Stainless Sleeves, Train Horns
Interior: 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges, Aeroforce Interceptor Gauge, LED Lows & Fogs, Painted accents
Performance: EFI Live Tuned by Blackout Performance, Custom Blackout Performance S475 over stock twins, 45 over stock injectors, MBRP Turbo Back Stainless Exhaust (Straight piped), Raptor Lift Pump, AFE Filter, GMAX6 kit with Suncoast 1057 converter installed by Blackout Performance
1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
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post #8 of 60 (permalink) Old 10-13-2007, 09:43 PM Thread Starter
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even when it is just the stock 3.5" exhaust

2004.5 CHEVROLET 2500HD
4 DOOR
LONGBOX
6.6L LLY DURAMAX
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post #9 of 60 (permalink) Old 10-13-2007, 09:52 PM
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Quote:
Originally Posted by power95 View Post
even when it is just the stock 3.5" exhaust
What do u mean?

Jason
2006 Silverado 2500HD LBZ CC SB
Exterior: Escalade Handles, Front windows tinted to match the rear, painted bumpers & mirrors, billet grille, 305/50/20 Cooper Zeons on BMF Novakanes Death Metal, Cognito Braces, Stainless Sleeves, Train Horns
Interior: 4 Kicker 10in Subs in 2 custom box's, Autometer Ultra lite II Pyro and Boost gauges, Aeroforce Interceptor Gauge, LED Lows & Fogs, Painted accents
Performance: EFI Live Tuned by Blackout Performance, Custom Blackout Performance S475 over stock twins, 45 over stock injectors, MBRP Turbo Back Stainless Exhaust (Straight piped), Raptor Lift Pump, AFE Filter, GMAX6 kit with Suncoast 1057 converter installed by Blackout Performance
1999 Ford F-550 PowerStroke ''Wrecker'' **Jerrdan bed, S&B Intake
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post #10 of 60 (permalink) Old 10-13-2007, 09:55 PM Thread Starter
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will it be loud with just the stock exhaust without the muffler

2004.5 CHEVROLET 2500HD
4 DOOR
LONGBOX
6.6L LLY DURAMAX
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