A Proven V-Twin Performance Center

Jarz Performance Engines 

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  EVO Big Twin Kits | Twin Cam Kits | Machine Shop Services | Dyno Room

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CYLINDER HEAD PORTING & FLOWING

JARZ Street Ported Heads:  “Twin Cam ^TM & Evolution ^TM”.  We vastly improve the flow curve, beginning at low, mid and lifts up to .650, using a slightly larger Baisley  intake and exhaust valve with a distinctive port shape and a double radius seat grind performed on a Sunnen VGS-20. All heads are flowbench tested by JON ANDRES RACING on a FLOWLAB 520 by Quadrant Scientific for consistency.

These heads are designed primarily for street riding and will create a wide powerband.  We have seen 100 ft. lbs. of torque and over 100 HP (under 6,000 RPM) on 80 cubic inch Evolutions ^TM, and over 115 HP and 115 ft. lbs. of torque on Twin cam 95 ci engines.

For those who want more horsepower we highly recommend Baisley Hi-Performance Ported Heads.  So far in our testing, we have seen over 130 HP on Baisley Hybrid Heads (Note:  these are still an H-D casting), or ask us regarding his revolutionary dual carbed heads:  Pro-flash record setting heads, 9.7 seconds with no wheelie bars, no air shifter and street tire - - all with only 88 cubic inches.  WHEW !!  Note:  Baisley also used these heads on his first  7 second Pro-Stock Harley; ET 7.54 at 177 mph. to be exact.

STAGE II HEADS: This set up will give you up to 115 ft.lbs. of torque on 95 ci Twin Cam , 90 ft.lbs. on 80ci EVO. 
Locked and Loaded Price $640.00 plus tax.
Works best with W6 or W6H cams.

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Jarz heads set up for up to .600 " lift