Then Gen4/5 3SGTE comes stock with a CT15 burdened by a small compressor wheel that struggles at high RPM. We machine the compressor housing for a larger billet compressor wheel, installed in house with new bearings and precisely balanced for maximum longevity.

This is a great upgrade for a stock ECU Gen4/5 swap, fully compatible with stock electronics. We've also made up to 420whp with this turbo.

Stock CT15 vs CT16 - no other changes.

This is still a journal bearing turbo, therefore we recommend Valvoline VR1 oil. Warranty claims that show bearing damage will require an oil test.

Does not include exhaust manifold, which also serves as the turbine housing. We highly recommended porting the wastegate opening and offer this service. Even with the wastegate ported and a billet actuator, these still tend to creep. This is especially notable on E85.

Receive a $400 refund when you send back your CT15.

These are built by Aaron Bunch and often have a significant lead time. Reach out to us to check current availability.