4" exhaust or exhaust brake first
 

I need to get an exhaust brake and a 4" exhaust. I'm not sure how to do this. Does the 4" exhaust bolt up to an exhaust brake? Do the brakes come in different sizes?

Can I put a 4" exhaust on if I already have an exhaust brake?

I have a '95 that I bought with an exhaust brake and it has a 4 inch exhaust on it.

That is what I want to end up with.
I wonder if an exhaust system from mbrp would bolt up to an exhaust brake

If you can find a brake thats a direct replacement for the stock 45º elbow, then maybe. Otherwise probably not.

If turbo mount... most are going to need you to shorten the downpipe, maybe use a different flange.

If inline mount... you just cut the pipe where you want it and weld in two flanges. Nice thing here is you can upgrade the turbo later and not be stuck with a brake that doesn't fit.

Ok. Thanks u2slow. I guess I need to do some research on some different exhaust brakes

When I had a 12 valve, different valve springs were required prior to installing an exhaust brake on my auto equipped 2500. You might want to check the requirements first.

^Yes. I forget that detail.

This is the exhaust brake I'm going to buy for my 97.
https://www.dieselperformance.com/sh...c-remote-16319

I already have 4" exhaust from turbo on back. I also have a modified Holset HE351CW turbo sitting on my tech bench, almost ready to install, that also has the stock cast iron 45-degree elbow that will connect to the downpipe. I'm going to install the e-brake in the downpipe as close to the turbo as possible. This should minimize the volume of pipe to fill with back-pressure, so there should be minimal delay when the e-brake is engaged. Like u2slow said, buying an inline e-brake will allow you to keep the e-brake even if you decide to change to a different turbo later on.

Also, regarding high pressure exhaust valve springs being required, at least for this model. I called BD-Diesel and got to talk with a tech support guy who had spent quite a few years in their service area about this. The reason being the install manual indicates this e-brake CAN be used with stock valves but highly recommends 60-lb valve springs. This guy confirmed it CAN be used with stock springs, but the truck won't get the full benefit of the e-brake without them. That said, I think I'll buy and install the e-brake and adjust the e-brake so I can use it with the stock springs, then later when I have time to upgrade, the e-brake will just need to be adjusted for their use.

Does your turbo have a 4” outlet?