EVO Big Twin Packages
(Click on each stage for more information)

Stage 1 - $399

Includes:

Performance Valve Job
Touch-up porting under seats

“Valve Job” is such a critical foundation for the overall foundation of the cylinder head. We spend countless hours researching the angles that benefit the stock ports maximum benefit. We spend time hand finishing under the seat on the intake side to grab those last few extra CFM in every valve job. Every head is then surfaced for flatness (up to .010” per the customer’s request) to ensure our MLS head gasket will seal as is should. Heads are thoroughly cleaned, inspected, valve seats are formed, valve faces renewed and assembled with high temperature Viton seals. 1.650 window.

Stage 2 - $799

Includes:

Performance Valve Job
Touch-up porting under seats
New Intake & Exhaust Valves
New Bronze Guides
New Spring Pack - .600" Lift Beehive

This is the service that has put XLXBhorsepower on the map, by far the best ‘bang for the buck’ for your everyday ride. Combine the above Stage 1 service and a premium .600” spring pack set to the cams spec your running. Bowl blending will extend down further beneath the seat in the critical areas. Stem protrusion and seat pressures will be tailored to your cam to ensure maximum longevity on your hot rod street bike whether it’s a Bagger or your custom build chopper. This is hands down the best choice for your everyday rider, Balanced HP & TQ results without sacrificing and losing the port velocity with the huge valves found in the bigger builds. 1.650 window.

Stage 3 - $1095

Includes:

Performance Valve Job
Full 'Street' Port with XLXB Exclusive Texture Intake Finish
New .650" Lift Beehive Spring Pack
New Bronze Guides
New 1.900 Intake and Exhaust Valves

Exactly what the title says, when you’re building that larger CI motor and want the results on the left side the scale this is your choice. We knock the original guides out of the way to ensure we have access to port every inch, where it counts in the port. Replaced with premium bronze guides sized to control that valve as it should be, new premium valves 1.900” both intake and 1.610 exhaust. 1.780 window.

Stage 4 - $1,395

Includes:

Performance Valve Job
Full 'Race' Port with XLXB Exclusive Texture Intake Finish
New .650" Lift Titanium Dual Spring Pack
New Bronze Guides
New 1.980/2.000 Intake and Exhaust Valves
New Valve Intake Seats

Building the biggest bore street / strip motor, this is your pick! We install oversize intake seats to accommodate a 1.980 / 2” valve to grab every CFM possible out of a 1.780 window.

**Titanium Valves available by request for additional cost

EVO Big Twin Packages
(Click on each stage for more information)

About Us

Support

Contact Us

EVO Big Twin Packages (Click on each stage for more information)

About Us

Support

Contact Us

EVO Big Twin Packages
(Click on each stage for more information)