Jesse's 200mph Challenger - Hot Rod Magazine - January 2014

Bradley Built Engines | Gen III Hemi Entry featuring THITEK Heads 2013 Amsoil Engine Masters Challenge

Thitek GIIIH "Bear" - Assembled CNC Complete Dual Spring

Thitek GIIIH "Bear" - Assembled CNC Complete Beehive

Jesse's 200mph
Challenger Another ThiTek Customer
Featured in Hot Rod Magazine read more

BES/HPP
Street Outlaw Challenger - NMCA Digital Article read more

Congratulations Justin 2013 THITEK Stroker Class Champ
Modern Street Hemi Shootout read more

Bradley Built
& THITEK Heads Amsoil Engine Masters Challenge read more

GIIIH | Custom Heads For Extreme Builds Requiring Heads to Match. read more

GIIIH
CNC Ported | Dual Springs CNC Ported | Fully Assembled | Dual Springs
The Ultimate Street/Strip Performance Heads. read more

GIIH | CNC Ported | Beehive CNC Ported | Fully Assembled | Beehive Springs
The Ultimate Street/Strip Performance Heads. read more

Thitek GIIIH | CNC Ported CNC Ported Heads, Ready for Your Parts Package. read more

GIIIH | Cast Porters An Blank Canvas, Ready for Porting. read more

Thitek GIIIH "Bear" The Only 100% Aftermarket Gen III Hemi Heads read more

THITEK Performance

THITEK offers the only unique cast cylinder heads for the Gen III Hemi platform. Our commitment to quality, engineering, performance and customer service is second to none.

THITEK "Bear" | Gen III Hemi Heads

Answering the Hemi Call: New Cast, Real Options

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.

GIIIH "Bear" Standard Versions

Cast Porters

CNC Ported

CNC Ported | w/ Beehive

CNC Ported | w/ Dual Springs

Custom Heads

Learn More About THITEK's GIIIH "Bear" Cylinder Heads

Recent News

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Jesse's 200mph Challenger

Hot Rod Magazine is highlighting another top build featuring ThiTek heads, Jesse Iwuji’s 200mph Challenger. Congratulations to Jesse for breaking the 200mph wall. We are extremely proud our heads were chosen to be a part of Jesse’s build and wish him the best of luck at his next top speed event.

BES/HPP Street Outlaw Build

The Street Outlaw build by BES/HPP for Rob Goss is featured this month on the NCMA website. This is an all out build featuring Thitek’s Bear GIIIH Cylinder Heads.

PRI Indy 2013

Thitek is on hand for the PRI show in Indianapolis (December 12th – 14th). Drop by booth #8301 and meet Craig Thibeau, owner and chief cylinder head tech at Thitek.