Straight pipe performance

[Applejax95]

I recently bought a 1995 5spd Powerstroke with stock everything except window tint. I didnt like the lack of sound so i immediatly got it 4" straight-piped. My question is am i losing low end performance? Do i need a muffler to get better low end power? Also as a new owner with a basically stock truck except a TS 6 position chip and a 4" straight pipe side-out, what can i add for more "bolt on" power?

[erics diesel]

Did you get rid of the factory down pipe when you put the straight pipe in? Also look into the 6637 air filter mod

[Applejax95]

no i have the factory downpipe still equipped. how much is a bigger one and is it an easy install? and i will check out the air filter.

[erics diesel]

I would go with a diamond eye down pipe they are around 100. They can be a little bit of a pain to install you will need to cut the old one in half to get it out and bend the pinch weld on the fire wall down to clear it.

[Applejax95]

ok thanks i will look into that. does riff raff produce a decent 6637?

[richardi503]

I put a Riffraff 6637 filter system on this summer. It is easy to install and well built. I also put on the filter sock. love the sound of the turbo. Great setup. Let me know if youhave any questions on it.

[Justin@DP-Tuner]

You do not need a muffler at all. It will not affect low end performance. It is a turbocharged engine, so the more flow, the better.

Have you ever looked at your stock downpipe? It is flattened out like a pancake and is very restrictive. Get rid of that thing and get an aftermarket one.

[Buck Futter]

When you decide to upgrade the factory pancake downpipe, find a scissor jack and use it to push your firewall in a little bit. This will save you a ton of time and frustration.
I spent quite some time trying to fit my diamond eye DP in there and it was not going to fit, but as soon as i used the scissor jack and moved the firewall it fit just fine.

[351fifty]

6637 intake, diamond eye down pipe will help you get what your after, then try tunes like TW, DP, and several others, good luck, i got my down pipe from cptrucks.com $100 shipped to my door

[yngbuck19]

Look into aero turbine mufflers if you want even less back pressure after you do the down pipe an get some good custom tunes