After 40 years of waiting, The Boss 429 has been resurrected with the availability of Complete Boss Nine Engines, Boss Nine Cylinder Heads, Intake Manifolds, Valve Covers, Gaskets, Pistons and associated parts.

From Street to Strip, Muscle car, Show car, Street rods to full out Racing applications, Jon Kaase Racing Engines INC. is in the process of producing Boss Nine replicas and P-51 engines custom tailored for your application. Now you can have the Boss 429 you always wanted in a complete ready to bolt in package! Give us a call to discuss options.

Follow the build up of the 589c.i. Kaase Boss Nine Mustang.

The Best Flowing, Most Powerful, User Friendly 429-460 Wedge Cylinder heads on the Market!

Bullet Proof Casting, Dual Oil Feeds to the rotor. This Oil Pump is a must for your 385 series build up.

The New Kaase C-400 Cylinder heads win the 2008 Engine Masters Challenge!

Click here for the latest results on whats new in the Racing Community!
     -----Brian Gahm wins the 2nd ADRL national event in Extreme Pro Stock.
     -----Brad Waddle prepares for NHRA A/A competition.
     -----Jason Collins wins the IHRA season opener in Pro Stock.