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bhartlage bhartlage is offline
New Member
Posts: 3
Join Date: Oct 2017
Car: M550i
Default 12-03-2017, 09:24 PM

I installed a JB4 on my M550i yesterday and am very impressed so far. My car pulls much harder from 0 to 120mph and the throttle response has improved significantly. Terry has been great to work with and very responsive to my install questions. I've sent him several WOT logs for validation and all looks good so far. I put together a rough draft install guide for the M550i and passed it on to Terry to finalize and share. I'm very happy so far this tune and plan to dyno soon. I will post results when complete.
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