VW Audi 1.8L & 2.0L Turbo Over Boost Solution Kit Boostvalve kit for the 1999.5 and up Drive-by-Wire throttle Volkswagen & Audi cars. This is the kit to order if you want to lower boost pressure and surging The over boost solution kit is based on the standard boostvalve kit but uses the boostvalve connected parallel to the N75 to dial out spikes and fix issues with chipped ECU error codes. Eliminates boost spikes and CEL's Complete parts and installation details included to install with factory N75 solenoid N75 "J" or Race solenoid