Garrett Power Max Direct Fit Performance Intercooler 2016-2021 Honda Civic 1.5T / SiGarrett Powermax direct fit performance charge air cooler for the 2016+ Honda Civic 1. 5T SI has a 90% larger core than stock and helps reduce intake manifold temperatures up to 60 F (15. 6 C) at heat soak. CFD optimized end tanks improve air flow distribution through the core. This performance intercooler showed a max increase of up to 17 WHP (12. 7 kW) and 14 lb ft of torque (19 N m) compared to OE during back to back dyno comparisons in a wind