Builder Tools
Free tools and calculators for gearheads, builders, and wrenchers.
VIN Decoder
Decode any 17-character VIN to reveal manufacturer, model year, country of origin, and check digit validation.
Fender Tag Decoder
Decode Mopar fender tags and body plates from classic Dodge, Plymouth, and Chrysler vehicles.
Coming SoonBolt Pattern Guide
Look up wheel bolt patterns, lug nut sizes, and hub bore specs by year, make, and model.
Coming SoonPaint Code Lookup
Find factory paint codes, color names, and matching touch-up paint by VIN or year/make/model.
Coming SoonTorque Spec Reference
Common torque specifications for lug nuts, head bolts, intake manifolds, and other critical fasteners.
Coming SoonTire Size Calculator
Compare tire sizes side-by-side — see diameter, width, sidewall height, speedometer difference, and clearance impact.
Coming SoonGear Ratio Calculator
Calculate final drive ratios, RPM at speed, and optimal gear combinations for your drivetrain setup.
Coming SoonEngine Displacement Calculator
Calculate engine displacement from bore and stroke. Convert between cubic inches, liters, and cubic centimeters.
Coming Soon
