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Sales Hours: Monday - Friday 8:00am - 5:00pm PST

North America: 1 (877) WEISTEC (934-7832) - Option 1
International: (714) 202-0005

Sales Department:

Address: 1266 N La Loma Cir, Anaheim, CA 92806


Technical Support

Support Hours: Monday - Friday 9:00am - 4:00pm PST

Technical Support by Email: To request technical support on Weistec products and services please email  A help ticket will be automatically generated.  Tickets are addressed in order received.  Typically, if a ticket is created during support hours, there will be a response within an hour.

Installation Manuals

Installation instructions are available in .PDF form on each applicable product page. Click on the wrench icon.

Knowledge Base

Computer Tuning Process: How do I get my computer tuned?

Crank vs Wheel Horsepower

Why Twin-Screw

Weistec Turbo Upgrade FAQ

Warranty and Forms

Weistec prides itself in delivering high quality, dependable products. We stand behind those products, and our customers who use them. Make sure to register your warranty after any Weistec Purchase!

Weistec Warranty Registration

Weistec Limited Warranty

Magnuson-Moss Warranty Act

M113K Calibration Request Form

M133 Calibration Request Form

M156 Calibration Request Form

M157 Calibration Request Form

M159 Calibration Request Form

M177 Calibration Request Form

M178 Calibration Request Form

M256 Calibration Request Form

M274 Calibration Request Form

M276 Calibration Request Form

M278 Calibration Request Form

Weistec Dealer / Installer Program

Weistec Engineering invites qualified companies in major markets internationally to join our team as distributors and/or installers of products from the Weistec product line. Innovations developed from engineering and design make Weistec products a top notch shelf item.

Click Here to learn more about our Dealer / Installer Program.

Contact Weistec Form