Chevy Colorado and GMC Canyon Specialist

Engine Conversion, Brake and Suspension Specialist for over 25 years.
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Vortec 4200 / 4.2 Atlas & Colorado / Canyon Available Parts

Performance solutions for your Vortec 4200 LL8 / Atlas 4.2 & Colorado applications! Made in the USA.

Vortec 4200/ Atlas 4.2 to Colorado swap-mounts.

Bilstein Adjustable Height Coil-Over System

AR5 Universal shift adapter.

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Please contact me for any application questions.
Is a welding, metal fabrication and automotive parts shop devoted to creation of custom parts for your 4200 platform.
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About Us
42004U is owned by fabricator Francisco Thomen, who has over 30 years of experience in custom metal fabrication and hot rod customization. We are open for commissions or collaborations to bring your project to life or to meet your business needs. *No job is too small.
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1621 Julesse Ave Suite B SACRAMENTO CA 95818 USA
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