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4" exhaust or exhaust brake first

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Old 11-07-2017, 11:37 PM
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Question 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?
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Old 11-10-2017, 11:21 PM
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Can I put a 4" exhaust on if I already have an exhaust brake?
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Old 11-11-2017, 07:28 AM
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I have a '95 that I bought with an exhaust brake and it has a 4 inch exhaust on it.
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Old 11-14-2017, 11:09 PM
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That is what I want to end up with.
I wonder if an exhaust system from mbrp would bolt up to an exhaust brake
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Old 11-19-2017, 05:57 PM
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Originally Posted by marv h. View Post
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 45 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.
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Old 12-13-2017, 09:34 PM
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Ok. Thanks u2slow. I guess I need to do some research on some different exhaust brakes
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Old 12-14-2017, 05:15 PM
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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.
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Old 12-15-2017, 12:24 AM
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Originally Posted by Desert5600 View Post
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.
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Old 01-04-2018, 03:19 PM
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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.
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Old 01-28-2018, 11:16 PM
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Does your turbo have a 4” outlet?
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Old 10-26-2018, 02:25 PM
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I put in the exhaust brake (best mod I have done hauling trailers in the mountains). Went with a three inch down pipe and four inch the rest of the way back. I did have to put in 60# valve springs. Was told stock is 30# and will just had have blow by and not hold the truck back.
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