2000–2005 VW GTI / Jetta / GLI / Golf 1.8T (AWP) Stage 2 ECU Tune

Stage 2 = The Real 1.8T Experience ?

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BDT STAGE 2 TUNE FEATURES

• Huge horsepower & torque gains over Stage 1 with proper exhaust flow
• Boost targets optimized for fast spool + hard pull
• Speed limiter removed
• Torque limiters raised
• Fueling optimized by throttle position
• Overrun crackles & pops (optional)
• Boost control refined for smooth, linear delivery
• Turbo lag reduced / quicker response
• Low pressure fuel pump pressure raised
• Variable valve timing recalibration
• OBDII flash at home — no shop required
• Award-Winning 2-Step (34+ event wins)
• No-Lift-Shift (NLS) for manuals
• MAF-less tuning available (build-dependent)
• Immobilizer delete available (ECU swaps)
• TRACK USE ONLY OPTION(N80, N249, Rear O2, SAI, EVAP)

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MK4 1.8T (AWP) — STAGE 2

Stage 2 is where the MK4 stops feeling “quick for its age” and starts feeling legit fast. With a high-flow downpipe/exhaust setup, the K03 holds boost longer and hits harder.

Expect up to: ~265 WHP / ~285 WTQ on 93 octane with required hardware. That’s the classic 1.8T shove you’ve been chasing.

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AWARD-WINNING 2-STEP LAUNCH CONTROL

If you want loud, crisp, anti-lag energy that makes people look up instantly — BDT 2-Step is that smoke.

CRACKLE POPS / OVERRUN (OPTIONAL)

Lift at high RPM and it gives you that spicy decel chatter. Stock exhaust = subtle. High-flow/downpipe = straight menace.

BOOST CONTROL DIALED

Factory boost strategy is lazy and inconsistent. Stage 2 cleans the curve so you get a smooth surge through the whole pull.

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POWER GAINS

Power varies with fuel quality, altitude, maintenance, and supporting mods.

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ECU TUNE MODIFICATION REQUIREMENTS

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SOFTWARE INSTALLATION REQUIREMENTS

EMISSIONS COMPLIANCE NOTICE & LEGAL DISCLAIMER

FOR COMPETITION USE ONLY — NOT FOR STREET USE

This product is sold and intended solely for vehicles used in closed-course racing, off-road competition, or organized motorsport events. It is not legal for use on any pollution-controlled vehicle operated on public roads or highways, as defined under the Clean Air Act (42 U.S.C. § 7522) and applicable state emissions laws.

Federal and State Emissions Compliance

• This product may modify, bypass, defeat, or render inoperative emissions control devices.
• Installation/use on emissions-regulated vehicles is strictly prohibited and may result in penalties (up to $45,000 per vehicle).
• Not EPA/CARB-certified; not legal for sale or use in California or CARB-aligned states.

EPA has enforcement authority under the Clean Air Act to pursue defeat devices.

Assumption of Risk & Waiver of Liability

• You assume all responsibility for legal compliance.
• You waive claims against Boost Dynamic Tuning, LLC for unlawful use.
• You release Boost Dynamic Tuning, LLC from damages or penalties from improper/unlawful use.

⚖️ Indemnification Clause

You agree to indemnify, defend, and hold harmless Boost Dynamic Tuning, LLC from any fines, damages, or fees resulting from misuse or violation of emissions laws.

Final Notice

Sold “as is” and “with all faults,” with no warranties regarding legality for highway use or emissions compliance. End-user is responsible for determining legality. BDT does not condone illegal street use or emissions tampering.