About Thitek

Owner, Craig Thibeau, has been in the automotive performance aftermarket industry for over 15 years, with more than 10 years dedicated, specifically in high performance cylinder heads.

During his time in LS cylinder head manufacture for over 11 years, which is where the late model Hemi caught his attention. While working with the Mopar Performance Heads, Craig saw the potential in the Gen III Hemi Platform.

Years later Craig saw there was a need for an high performance cylinder head, and no one had stepped to the plate.

Thitek Inc was founded to fill that need, and answer the call of the Gen III Hemi performance crowd and racers. Thitek is first to bring a full 100% Aftermarket cast Performance Cylinder Head to market.

The Thitek GIIIH "Bear" is the first aftermarket available cylinder head for the Late Model Hemi platform. A true bolt on cylinder head design that replaces the factory cylinder head with no other modifications needed.


The ultimate in performance upgrade for your G III / IV late model engine. Airflow has been increased from over 75 cfm on the 2.125" 200 cc head to over a whooping 100 cfm on the 2.165" 205cc head over factory as cast cylinder heads. A high flow exhaust port design increases airflow over 50 cfm over the factory designs.


Increased performance and reliability are two of the main benefits of using the "Bear". Gains in performance over factory ported cylinder heads have been seen over 50+ rear wheel and gains at the track of over a full second in the quarter mile. Boost levels can be increased over what was reliable with a factory cylinder head casting, head gaskets stay put when using high boost pressures.