jb4tuner

Selling a Burger Motorsports JB4 tuner for the A90 / B58 Supra. This is the latest version (purchased new last year) that has EWG connectivity, added Bluetooth option, plus the optional fuel board / fuel pressure sensor connection. Total was $780 new with all those options in Nov 2024. It is...

JB4 w/ wireless smart phone kit and proclip phone holder. $550 plus shipping and PayPal fees

Hey everyone, I’m running a catless downpipe and E30 mix on a jb4. after the install it felt like the power delivery isn’t very smooth and the gear changes are much slower. I’ve tested Map 3 +6PSI and Map 5 22psi absolute target. Map 5 feels fastest but I think it can be optimized. any...