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104301 Absolute pressure sensor, intake manifold, plausibility, caster: pressure too high Anyone seen this? Have had JB4 w/ EWG on for 2 weeks installed with Akra exhaust, AA downpipe. Just upgraded firmware to V19 the other day, running map 2 currently. Posted to JB4 forum but sometimes they...

Car stock made less than impressive numbers, I was wondering why that could be - figured, do upgrades and see if they're made up for. Low and behold, they weren't. Stock baseline 360/365 horsepower, post JB4+downpipe/exhaust, only made 390's whereas I've seen other (Z4 M40i btw) make 380s-390s...

Car will be ready end of week, went from stock to full exhaust / bigger tires / eibach pro kit and JB4 with EWG. Planning on e30 blend with JB4, wondering if there’s any headroom I can make with a Pure upgrade without the ability to do a custom tune. Obviously the other option is just wait it...

Figured I'd make a new thread instead of trying to revive old ones. Anyone that's done a full XPEL, what did it set you back? Trying to ensure that quotes I get are not overpriced.

Looking for 2 of these - hard to find right now, on backorder - checked all the normal sites, no dice. Got some 285 rears and trying to complete the set. Happy to pay a little over MSRP (plus shipping costs of course) to the right person, or if anyone can direct me to a local shop somewhere...

Assuming it's Covid related - I've called about...6 vendors looking for Michelin PS4S 265/35/R19 fronts. I already had the 285 rears delivered, and an order in for the 265 that the vendor cancelled saying they realized they didn't have any. Anyone have a lead on a place I could get them? Much...

Good reliable year round street tire for my scenario? About to Jb4, Map3, have full exhaust sitting in the garage. Looking to get Eibach Z4 Pro-kit to lower 20mm, drop some new tires. Probably R888R 265 front / 285 rear. Car is garaged and not my DD, just used for spirited weekend drives and...

Just curious since BMW added the 48V hybrid brake regeneration system to the B58's(is this coming to the supra/z4 as well?)...does this change anything as it relates to tuning & performance ? It was something I never really noticed before that they changed for 2021. just curious if there are...

Just curious - Have an EU company quoting me on exhaust, said cheapest option would be to pick it up from the closest airport vs having it delivered. They said they give the customs paperwork in advance, you go, pay duties, show customs paperwork, take your shit home. Never done this before...