Turbo Lab’s ko3 ko4 ko6 50mm x 61mm billet compressor wheel upgrade.

Turbo Lab now offers a 50mm x 61mm billet compressor wheel upgrade for ko3/ko4/k06 turbo chargers. The craftsmanship of the ko3 turbo upgrade is intense because it involve very precise machine skills to make this turbo build possible. The new inlet of the compressor housing becomes a massive 2.375″ outside diameter which is flared out for more air flow and better spool capability.

This turbo upgrade also utilizes the biggest turbine available for the k series turbo which is the 44.5 mm x 50 mm ko4/ko6 turbine. We can also offer turbine clipping for this turbo to help with even more flow capability.  If you have a ko4 or ko6 from factory your turbo would just need a simple compressor upgrade to build what you see here. Keep in mind not all of the compressor housings are the same, if your wondering why this compressor housing doesn’t look like yours, the reason why is because its probably not the same housing, but as long as your turbo is a ko3-k06 we can offer this 50mm x 61mm compressor upgrade.

The most common cars that run the Borg Warner k series turbos are the audi a4, voltswagen jetta and gti, chevy cobalt, pontiac sky, and mazda 3.  We are proud to now offer this turbo, though we have not gotten any result of what it will do, we can predict by its size that it should be able to 320-350whp of airflow.  We are even more excited to upgrade the twin turbos on an audi a6 next to see what we can get out of them. With two of these turbo upgrades on an audi a6 2.7 v6, we are expecting to see 500-600 hp of air flow.