When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
It is called the "UK Exhaust Mod" because it was first done by an owner in the UK and then posted onto this forum to share the unique process and unique result.
The car in the King Motorsports link, above, is mine (note my last name on the dyno report). I opted for the 25mm bypass which King so expertly installed. It gave me exactly the sound that I was looking for to better "read the engine" on the track. It turned out that there was a minor increase in performance on the dyno but not enough to make this a compelling modification. The dyno was done while I was without FI. I was then between my old Comptech SC and waiting for my SOS SC. I do not have comparative dyno runs with FI.
However, it seems that most folks install a larger bypass in the 44mm ± range.
Isn't the UK mod also done on a lot of other cars? I think I saw an article on the Z4 or something being able to do it as well. And I think a lot of 911s... I believe the bypass pipe on mine is much larger. It is almost the diameter of the pipe leading to the muffler itself! Will take pics today, as my wheels are off and it's easy to see at the moment.
It is called the "UK Exhaust Mod" because it was first done by an owner in the UK and then posted onto this forum to share the unique process and unique result.
The car in the King Motorsports link, above, is mine (note my last name on the dyno report). I opted for the 25mm bypass which King so expertly installed. It gave me exactly the sound that I was looking for to better "read the engine" on the track. It turned out that there was a minor increase in performance on the dyno but not enough to make this a compelling modification. The dyno was done while I was without FI. I was then between my old Comptech SC and waiting for my SOS SC. I do not have comparative dyno runs with FI.
However, it seems that most folks install a larger bypass in the 44mm ± range.
Seen a lot of crap UK mods and quite shocking workmanship,so if you don't have a quality fabricator,leave it alone..
Got some 25mm pipe,but not yet installed
I traded my Invidia exhaust to someone in Bay Area (back when I lived there) so he had it done locally down there. Not sure where a good place to do it around here might be.
03-04-2019, 12:51 PM
