i have an 01 duramaxx with an air aid intake ppe boost valve and a hypertech on stage 3 (96hp) runs great, egts are stay below 1200 whall towing 33 ft trailer. i want to know if i would benifit from a 4in exhaust? would i loose any bottom end?

yes, you would benefit... anyone and everyone benefits from a bigger exhausts. No, you wouldn't lose any bottom end power.

yeah, you would. as soon as you add any tuner, or up the power, you should upgrade your exhaust. a 4" would be more than adequate, or you could straight pipe your oem exhaust.

DONT CUT YOUR FACTORY EXHAUST Many people do it but they are expensive if you have to trade it in . You will see noticable gains in HP and MPG with a 4" turbo back exhaust.

will it be a noticeable increase in power by way of the butt dyno? and where can i find the best deal?

Lower EGT's about 100 degrees. Best deal I found was ( not to popular )
aluminized steel Jerry Jardine. :D And he is a Supporting vendor here!
T & J's Diesel Performance Chevrolet/GM Duramax 2000-2007 4" Turbo Back kit wi (http://www.tjdieselperformance.com/servlet/Detail?no=70)

thanks just ordered one, ill return and report.

If you lose bottom end with the full system like I did on my LB7 just put your stock 3 1/2" front pipe back on. I did this and you still get the benefits of lower egt's and you'll get your bottom end back.

DONT CUT YOUR FACTORY EXHAUST Many people do it but they are expensive if you have to trade it in . You will see noticable gains in HP and MPG with a 4" turbo back exhaust.

Unless you have another factory one to cut up :)

Lower EGT's about 100 degrees. Best deal I found was ( not to popular )
aluminized steel Jerry Jardine. :D And he is a Supporting vendor here!
T & J's Diesel Performance Chevrolet/GM Duramax 2000-2007 4" Turbo Back kit wi (http://www.tjdieselperformance.com/servlet/Detail?no=70)


I just ordered mine today too.:D:lol: There was a bid write up on it in the review section started by Rick.

If you lose bottom end with the full system like I did on my LB7 just put your stock 3 1/2" front pipe back on. I did this and you still get the benefits of lower egt's and you'll get your bottom end back.
If you lose bottom end(which i highly doubt) MBRP makes a torque tube that you could put on your exhaust.

what mods did you have when you lost power?

what mods did you have when you lost power?My LB7 was 100% stock the exhaust was my first mod. I wish I would have tried the full system with the 6-gun but I did drive allot with the 6-gun turned off so I would have had to deal with the dead bottom end when on stock. Others may have different results than I did with a full system but It definately hurt my trucks power.

thanks just ordered one, ill return and report.

Installed yet?

I thought I'd chime in on this thread and throw my .02 in. I have an 02 that I just had a 4inch mbrp turbo back installed two days ago. I also run the hypertech on level 3.

My advice is to get the exhaust. Besides having a very deep sound, I have noticed better pedal response and spool up. EGT's seem to run a little cooler and cool down is much faster. I am very happy I finally decided to pull the trigger and get the exhaust. Now I just wish I had done it sooner.

You won't be disappointed.