[fenceman74]

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

 

[FirstDiesel]

Can you learn to say "Hello Officer" a lot???

 

[Professor]

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.

 

[fenceman74]

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

 

[rescueadam]

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!!

 

[Stove]

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.

 

[ticker454]

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.

 

[1BADHD]

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!!

 

[ticker454]

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.