Exsaust - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 03-14-2008, 04:30 PM Thread Starter
 
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Can i cut my muffler off and just put a stright with a miner bend at the end and still be good with back presure to the turbo?
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post #2 of 10 (permalink) Old 03-14-2008, 07:31 PM
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Go on the auction site and get a muffler delete pipe. Its cheap and already bent, so all you have to do is bolt it in and go. I have a straight piped with no kat, and I have yet to have a problem with backpressure. I dont think the LB7 has a backpressure sensor. But I have been wrong before!

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #3 of 10 (permalink) Old 03-17-2008, 01:03 AM Thread Starter
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Hey Horse... Cant i just cut it off and weld up a stright? or were can i get a cheap muffle delete pipe... would they sell them at the local auto parts store?
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post #4 of 10 (permalink) Old 03-17-2008, 11:34 AM
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You could cut out the muffler, but then you have to have a new pipe bent. I have always seen something as cheap as the muffler delete pipes are to be the best way, as they are pre bent and ready to go on with just cutting off the muffler.

IMO, it is better to buy a new turbo down pipe back and eliminate the muffler and cat all at one time. The 4in that I have on my truck really makes the truck sound mean when I get on it, and there is very little restriction.


Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #5 of 10 (permalink) Old 03-17-2008, 08:55 PM
 
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:iagree 4in turbo back is the way to go. And its sounds nice when you get on it!:evil: If you dont have they money to do that just cut it off and weld a pipe in place like you were going to do. Thats what I did to start off with untill I got the 4in exhaust....
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post #6 of 10 (permalink) Old 03-17-2008, 09:11 PM
 
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stop being cheap and get a flowmaster exhualst i know we sell them around $560
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post #7 of 10 (permalink) Old 03-18-2008, 04:27 AM
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did a summit 4" turbo back system on an 02 with no issues and under 400 shipped and the thing sounds awesome and thats with a muffler

01 quad cab 4x4, edge drag comp, 4" exhaust, fass 150, 250 ddps, Jefferson State compounds 683hp so vp 11.91. AMSOIL front to rear. now back to stock 95 fummins in the works
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post #8 of 10 (permalink) Old 03-18-2008, 10:40 AM
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sleazebay has exhausts for under $250, yes there is shipping, but some of those are name brand!

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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post #9 of 10 (permalink) Old 03-21-2008, 05:21 PM Thread Starter
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YEah... I want to get the muffler delete pipe.. do i cut the muffler off and put the stright pipe were the mulffler was.. right over the pipe?
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post #10 of 10 (permalink) Old 03-21-2008, 05:24 PM
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I havent done a delete pipe on a Dmax, but I am sure that is the way it works, just wait until you get the pipe, and that will tell you by just looking at it. Or call whoever you are buying the pipe from and see if they can help you out with that.

Tony

2001 GMC 2500HD EC/LB, 4X4. A few go fast goodies. 540hp/1107tq Danville Dyno 11/09, Kennedy 40% injectors.

05 IH 9400i with Cummins ISX pulling a lumber bunk trailer, stuck in a swamp somewhere in Indiana.

Proud Veteran Served 6yrs Active Army From Germany, Kuwait and Bosnia to Ft. Hood and Ft. Knox
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