i was wondering about the pros and con of straight piping a gas truck if any.

Can you learn to say "Hello Officer" a lot??? http://www.dieselplace.com/forum/smileys/Big Smile.gif

I replaced my system with a cat-back flowmaster kit. The loss in low in torque was terrible. IMO the engine is so well tuned for the amount of backpressure, freeing up the exaust resulted in a loss of performance. It did run better in the 4500-5500 range. I ran tests with my G-tech before putting a stock system back on to verify the seat of pants opinion. Tests before and after with and without the tuner confirmed.

thanks for the info alot of people had told me that.Some say u need it but not as much as the factory put on the the muffler so i thought a straight pipe mught be to much.





thanksagain


wayne

I had the 2 in 2 out factory muffler removed. A buddy of mine who has a muffler shop put 2 glass packs in it. Couldn't realy tell any performance improvments, but it sure sounds mean!!http://www.dieselplace.com/forum/smileys/Cool.gif

I don't really think that any muffler change will result in much performance increase IMHO. With that being said, if you want noise like I did, you can get it without losing low in TQ. I replaced the 2 in 2 out factory with a flowmaster 2in and 2 out. The flowmaster is smaller diameter inlets so we followed with the smaller pipe straight out the back. From what I have read, 2 1/4 pipe for duals is large enough. Mine is loud but once at cruising rpm not bad. I don't feel that I lost any low end, but cannot prove that, but with the wester's I can break the tires lose easily.

A friend of mine put dual exhaust on his 8.1 and it runs a lot better. It has straight pipes so all I can say if you do the same you need ear plugs in the cab at 55mph.

It will be loud as hell!!! I had straight pipes for a whole 30 miles. Then put 30" packs on. Still to loud. then I got a chambered muffler. Much better. But, yet still sounds mean!!

I have twelve inch glass packs. it is loud but in overdrive it tones right down. If you step on it it will rattle windows but still no tickets.