Forum thread
Which downpipe?
Forty replies. Three different builds. None of them priced for your budget.
AI results for your exact car
Get More Power From Your Exact Car
AI maps a realistic gain in seconds — the horsepower, the stages, and what to skip.
Your build
2018 BMW 340i
Mapping your buildFast daily · $3,500
Crank hp est.
Mapping your build.
Illustrative whp
Stage roadmap
- 01Foundation
Stage 1
Intake · tune
- 02This budget
Stage 2
FMIC · downpipe
- 03Later
Stage 3
E85 · fueling
Supporting mods, then the tune. Big turbo waits.
Illustrative plan for a 2018 BMW 340i — not a measured dyno pull.
The hassle
Stop hunting through forums and random videos
Conflicting answers, the wrong car, and no budget. TunerLab replaces that search with one plan.
YouTube
Full bolt-on build
A different car, a different power goal, and no mention of what it costs.
TunerLab
One plan
One horsepower range. One stage order. Built for your car and your budget.
Process
How It Works
Three calm steps from vague idea to a build plan you can actually follow.
01Module
Tell Us About Your Car
Enter your year, make, model, current mods, budget, and goals.
02Module
Let AI Build Your Roadmap
TunerLab recommends a realistic upgrade path based on your goals, budget, and current setup.
03Module
Build With Confidence
See estimated gains, install order, pricing, compatibility notes, and your future build plan.
Pro capabilities
Build Smarter With TunerLab Pro
AI-powered upgrade paths, realistic performance projections, staged build planning, and smarter mod decisions for your exact vehicle.
- AI-powered build plans
- Realistic HP/TQ projections
- Stage-by-stage upgrade paths
- Budget-aware recommendations
- Saved garages & build tracking
- Future upgrade suggestions
Start with a free garage. Add your car, explore the planner, and unlock Pro when you're ready for full AI build sessions.
Your build · preview
Pro420–450
crank hp est.
+127 whp
Dyno estimate
Stage roadmap
- Stage 1Intake · tune
- Stage 2FMIC · DP
- Stage 3E85 · fueling
Your build starts here
Plan the smartest version of your car — before you spend a dollar on parts.
Create a free account, add your vehicle, and see what TunerLab can map for your chassis. Pro unlocks when you're ready for full AI build sessions.
Early traction
Built for real car people
Not generic AI users — enthusiasts who care about fitment, heat, and what actually works on the street.
0+
builds planned
0+
enthusiasts reached
Built for real car people, not generic AI users
FAQ
Questions, answered
Straight answers so you know what TunerLab is — and what it is not.
Estimates are modeled ranges based on typical outcomes for similar setups — not a replacement for a dyno or a professional tune. They are meant to guide planning and set expectations before you spend.
No. TunerLab helps you plan and prioritize. Installation, calibration, safety checks, and final validation still belong with qualified professionals.
Yes. You can describe what is already on the car so recommendations layer on your current setup instead of assuming a stock baseline.
TunerLab is built around enthusiast platforms first. Coverage will expand over time — enter your vehicle and goals to see what the planner can do today.
Yes. Create a free account to save your garage and vehicle profiles. Pro adds unlimited AI build plans so you can compare paths, budgets, and stages without starting from scratch.
Sign up free, add your car, and explore your garage first. When you start an AI build session, you can upgrade to Pro from inside the app — that's when checkout happens.
Recommendations aim to flag common compatibility pitfalls and supporting modifications — always double-check fitment, fueling, and local regulations before ordering.
Yes. Export a structured build sheet / plan for your records, your shop, or your crew.
Founder story
Built by an enthusiast, not a parts catalog.
TunerLab was built by someone who got tired of wasting hours digging through forums, YouTube videos, Facebook groups, and conflicting advice just to figure out what parts to buy next. The goal is simple: help enthusiasts build smarter before they spend money.