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3 inch exhaust for D40
  #1  
Old 12-01-2017, 05:21 AM
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Default 3 inch exhaust for D40

Having suffered some exhaust damage it seems like a good excuse to fit a 3 inch King Brown system from turbo back.
Has anyone on here fitted a 3 inch system to a D40 (140KW) and was there any noticeable improvement?
Is it necessary to have the diesel injector pump re calibrated or whatever?
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Old 12-01-2017, 08:02 AM
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Not necessarily need to touch pump.

There is alot of other brands of there for alot less money to.

Be sure to get a high flow cat and muffler for best results in my opinion
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Old 15-01-2017, 11:36 AM
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MattWij MattWij is offline
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I had a 3" Turbo back Exhaust put on my 126kW Nav.

I got a pretty affordable one. I have an Auto so it was also a DPF delete. It made a noticeable improvement before I got an ECU remap a month later to properly deal with the DPF delete.

If you have a DPF that gets lost in the exhaust upgrade, you will likely need to do a ECU reflash. There are other ways around it but if you want it done properly a remap is the way to do it.
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Old 18-01-2017, 01:20 AM
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Who did your ecu remap for you?
I have an 07 auto stx and ive been keen to upgrade the exhaust
for a while
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Old 22-01-2017, 02:01 PM
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Quote:
Originally Posted by MattWij View Post
I had a 3" Turbo back Exhaust put on my 126kW Nav.

I got a pretty affordable one. I have an Auto so it was also a DPF delete. It made a noticeable improvement before I got an ECU remap a month later to properly deal with the DPF delete.

If you have a DPF that gets lost in the exhaust upgrade, you will likely need to do a ECU reflash. There are other ways around it but if you want it done properly a remap is the way to do it.
Mine is a 140KW STX, and being a manual version has no DPF. The pipe leading to the cat converter was cracked and a hole had burned through the converter. That's the first time the exhaust people has seen one do that.
Had the system for a few days now and there is a noticeable improvement in acceleration through the gears. Noise level is low - typical diesel I guess. I will be interested to see if it improves the fuel economy, but unlikely at the moment as I am enjoying the extra oomph!
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Old 23-01-2017, 12:31 AM
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i have a 126kw d40 and have had a 3" system fitted for a year now. No real increase in performance, what what has surprised me is i now get about 50/60k's LESS per tank, go figure. Apparently the brain still thinks it's a standard exhaust, so I am currently enquiring about a ECU remap, which i was going to get anyway.
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