JB4 tune. Is it reliable?
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Junior Member
Joined: Sep 2021
Posts: 72
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2017 C43 Coupe
JB4 tune. Is it reliable?
I am planning on running my c43 stage 2 as I have new downpipes. I was wondering if the burgermotorsport tune JB4 is reliable?
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Also subscribe to my c43 and Porsche channel if you haven't already: https://www.youtube.com/channel/UCE8...FHUmHG6MU0E01w
MBWorld Fanatic!
Joined: Mar 2017
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From: Omaha, NE
'16 AMG GTS, '21 AMG GLE53
JB4 is extremely reliable, but if you did any research here, you'd find that it's not capable of eliminating the CEL you'll get with your new DPs, unless you have spacers or something like that to trick the sensors. JB4 is absolute best bang for your buck though. 55k miles, zero issues.
Junior Member
Joined: Sep 2021
Posts: 50
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2017 c43
sorry to jump on someone else's thread but I plan on JB4 myself, I just did the bms intakes and I wanted to know if there is a catted downpipe that wont give me a cel without anything or if there's a set that comes with the needed spacers? Looking to be under $1300 if possible
Thread Starter
Junior Member
Joined: Sep 2021
Posts: 72
Likes: 5
2017 C43 Coupe
unless you do spacers all changes in catalytic converters will risk CEL. also note that your engine is tuned for stock downpipes which means you will lose horsepower without a tune with new downpipes
