HKB Boss Kit - Toyota Soarer Z20 - OT-47 Model_1JZ By adjusting the venting bias

By adjusting the venting bias to suit the car you can achieve a blow-off sound without having to put up with the issues

Provides quick but smooth engagement and extended life

One of the best modification’s for any performance engine is reducing heat when power is increased temps are raised controlling temp will have a dramatic effect on engine power output

Mazda MX-5 NA MK1 1

By retaining the factory ECU control and recirculating the vented air

HKB Boss Kit - Toyota Soarer Z20 - OT-47 Model_1JZ By adjusting the venting biasHKB Steering Wheel Boss Kits are Design and made Japan, with the widest range available for all Japanese Vehicles. HKB bosses are double drilled fitment that can be used on both Nardi Personal and Momo Sparco OMP steering wheels. All HKB boss kits are plug and play and come with all all accessories needed for the vehicle operations such as Horn, indicator self cancelling, airbag light cancelling, HICAS operation and cruise control function & other