MBRP exhaust w/o muffler & converter

[spankustang]

How loud will it be INSIDE the vehicle?
I'm running the MBRP muffler and the cat converter right now and it sounds stock on the inside. I tow a trailer and don't want "too" much noise inside the cab!
And will it improve performance or mileage without cat conv.?

Thanks

 

[HeavyAssault]

It's not really that much of a sound level increase. Everything is bolt in so if you don't like it put the OEM stuff back in.

 

[Sleeper Diesel]

the 00 didnt come with a cat but with my 4" turboback mbrp exhaust. there is really no noticable sound in the cab untill 60 mph and there ia a little drone but not much. honostly i wish it was a little bit louder. may take of the muffler and run straight for a while

 

[Black06]

How loud will it be INSIDE the vehicle?
I'm running the MBRP muffler and the cat converter right now and it sounds stock on the inside. I tow a trailer and don't want "too" much noise inside the cab!
And will it improve performance or mileage without cat conv.?

Thanks

Just installed muffler delete for 4" MBRP cool duals (completely straight). Oustanding sound. Interior noise has changed minimally (radio is off listening for anything), but loud when you put your foot into it. 3000rpm sounds like a muscle-car; 2000rpm (8psi) has a nice rumble. Turbo whistle was the goal, and it's very high pitched and noticable. Wish I had completed this modification much sooner.

 

[spankustang]

Any noticeable power or mileage increase?

 

[FTG-05]

I hear "4 inch" and "5 inch" all the time. How does this compare to the OEM muffler pipe size?

Thanks,

Al

 

[HeavyAssault]

OEM tubing: Downpipe 3" to the convertor. After cat 3.5". It is all T409 steel.

 

[FTG-05]

OEM tubing: Downpipe 3" to the convertor. After cat 3.5". It is all T409 steel.

Thanks. No wonder I see posts that say going to a 4" or 5" is such big performance plus.

Thanks,

Al

 

[HeavyAssault]

Performance gains are NOT due to exhaust size but the EGT's will be much lower. If you were to add ONLY an exhaust system 4"-5" you will not gain you any HP&TQ. In fact the truck may loose low end power so it will feel like less HP is there.
Now looking at the "system" approach to doing mods. Increasing air flow in, adding fuel and increasing air flow out will give you the power you want and keep the EGTs in check with the 4"-5" ehxaust.
Exhaust alone isn't worth the cost or effort.
I was lucky to find the MBRP downpipe and cat delete pipe from forum members. I was even luckier that it all bolted up to the OEM system. I just cut the muffler out and have enjoyed it ever since I finished the project. I'm extremely happy with the results and the sound.