StageUp - Car Build Creator

StageUp is the free car modification build creator for enthusiasts. Pick your platform, select real aftermarket parts, and watch your estimated wheel horsepower update in real time.

PLAN YOUR BUILD
Browse 44 car platforms across 10 makes — BMW, Honda, Nissan, Toyota, Ford, Subaru, VW/Audi, Hyundai/Kia/Genesis, Dodge, and Chevrolet. Select parts across 16+ mod categories, including tunes, intakes, downpipes, turbos, exhaust, suspension, brakes, wheels, and more. Every product has real retail pricing and verified WHP gains.

TRACK YOUR BUDGET
Set a budget for each build and see exactly how much you've spent. Products that push you over budget are flagged automatically so you can plan smarter.

SEE YOUR POWER
Toggle between 93 octane, E30, E50, and E70+ ethanol to see how fuel affects your power output. The animated WHP display shows exactly where your build falls — from mild bolt-ons to a full-built race car.

VIN SCANNER
Scan your VIN with your camera or enter it manually. StageUp auto-detects your platform so you can start building immediately.

COMMUNITY
Publish your build to the gallery. Browse what others are building. Like builds, clone them as templates, and write part reviews with verified install badges. Request new parts and brands — the community votes, we research.

KNOWLEDGE BASE
38 in-depth articles covering everything from ECU tuning and flex fuel to built motors and suspension setup. Platform-specific build guides walk you through each stage.

BUILD OF THE WEEK
Every week, the most popular community build gets spotlighted on the home screen. Publish yours for a chance to be featured.

SUPPORTED PLATFORMS
BMW: G8X M3/M4, F8X M3/M4, X3M/X4M, X5M/X6M, B58, N55, N54, N52, E9X M3, F9X M5/M8
Honda: FL5 & FK8 Civic Type R, FL1 & 10th Gen Civic Si, S2000, Integra Type S
Nissan: 400Z, 370Z, GT-R R35, G37, S-Chassis
Toyota: GR86, GR Corolla, A80 Supra, GR Yaris
Ford: S550 & S650 Mustang GT, EcoBoost Mustang
Subaru: WRX STI, VB WRX
VW/Audi: Golf R/GTI, S4/S5
Hyundai/Kia: Veloster N, Genesis G70/Stinger
Dodge: Hellcat, Scat Pack
Chevrolet: C8 Corvette, Camaro SS/ZL1

Free to use. No subscriptions. No paywalls.