StageUp vs Auto Architect

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.

Auto Architect helps car enthusiasts plan smarter vehicle builds based on their goals, budget, and performance preferences. Explore upgrade paths, organize mods, and build your ideal car with a structured plan.