HP Ignition Uprated Coilpacks Specifications Specially designed for tuned engines operating at high revs and temperatures the HP Ignition coilpacks offer superior resistance and quality compared to OEM ignition coils. The installation of HP Ignition coilpacks will solve all common ignition problems such as misfires and hesitant performance. The HP Ignition coilpacks provide a gain in horsepower and torque up to 4 % thanks to their high and stable voltage ensuring a powerful spark even at high revs. The installation is totally plug & play without any modifications or adjustments necessary. Please note : these coilpacks are not suitable for VVTi versions (variable valve timing) of the 2JZ-GTE and 1JZ-GTE engines. We offer a 2JZ-GTE VVTI specific part number. Comparative Performance Graph Comparison carried out by our partner W-Autosport using a bone stock Nissan 200SX S14 with an SR20DET engine.