The addition of a GReddy intercooler is one of the best ways to safely increase horsepower in a turbocharged engine. By reducing the engine’s inlet temperatures, a denser air charge will enter the engine; this can make more horsepower at the same boost level and even more power at higher boost levels…(for more applicatons please see our TRUST catalog.) 

Intercooler upgrade kit

Engine: 1.5L (L15B7) Turbocharged DOHC I4

Years: 2016-on
(FK7) Civic Sport Hatchback

Years: 2017-on
(FC3) Civic Si Coupe
(FC1) Civic Si Sedan

GReddy Performance Products Intercooler Kit
Type-28E Core Dim: L600 / H248 / W66 mm
Aluminum intercooler piping, hoses, brackets

for more details please see (here)

for stock turbos or upgraded turbos
More peak performance over the smaller Type-31, but slightly less low speed throttle response

Type 28 kit vs Stock Intercooler Median Dyno results +14.53hp / 6.74ft/lb. peak

* Compatiable with GPP Civic Si / Hatch Oil Cooler kit, with minor modifications

also see smaller Type-31 E Intercooler kit p/n 12058100