Stage 1 is the most powerful tune you can get with stock hardware. Most people also report MPG improvements. Don't use with upgraded fuel hardware*, or you may increase overboost risk.

* Upgrading the 10mm fuel injection pump to a 11mm that's normally found in stock automatic 1.9L TDIs is still considered a fuel hardware upgrade. In that case it's recommended to reduce your fuel by adjusting your pump's IQ, or opt for a Stage 2 or 3 tune.

Stage 1.5

Requirements

Upgraded Injectors (See table Below)

Injector Size Chart
Nozzles	Hole/Nozzle size (mm)	Recommended HP range (11mm pump required for max)	Recommended Turbo
Sprint 520	0.205	90-130	Stock
DLC 520	0.205	90-150	Stock
Power Plus 520	0.214	110-170	Stock or VN17
DLC 1019	0.216	120-190	Stock or VN17
Power Plus 764	0.232	150-210	VNT17 or 17/22

Note that if a vehicle is running larger nozzles with a smaller turbo than recommended, we are not able to custom tune it. We highly recommend using the appropriate hardware for your turbo choice.

Stage 3

Requirements

Upgraded injectors, and clutch (if manual transmission)

Notes

Note that if a vehicle is running larger nozzles with a smaller turbo than recommended, we are not able to custom tune it. We highly recommend using the appropriate hardware for your turbo choice.

Stage 4

Requirements

• A "VNT-17" turbo (see table below)
• 3 bar MAP sensor
• Clutch Upgrade (manual)
• Turbo discharge adapter - Required to adapt a VNT-17 turbo's compressor outlet to your intercooler pipe
• Upgraded Injectors

Recommended

• Fuel Injection Pump Upgrade - Recommended in order to realize power gains from a turbo upgrade
• Exhaust Upgrade - Recommended for quicker boost build-up and lower exhaust gas temperature

Injector Size Chart
Nozzles	Hole/Nozzle size (mm)	Recommended HP range (11mm pump required for max)	Recommended Turbo
Sprint 520	0.205	90-130	Stock
DLC 520	0.205	90-150	Stock
Power Plus 520	0.214	110-170	Stock or VN17
DLC 1019	0.216	120-190	Stock or VN17
Power Plus 764	0.232	150-210	VNT17 or 17/22
DLC Race 520	0.260	140-230+	VNT17/22 or Larger

Note that if a vehicle is running larger nozzles with a smaller turbo than recommended, we are not able to custom tune it. We highly recommend using the appropriate hardware for your turbo choice.

Notes

* Genuine (OE) Garrett or Borg-Warner turbos are strongly recommended. The vast majority of rebuilt or hybrid turbos are not optimally calibrated. VNT type turbos are naturally more complex than wastegated turbos commonly found in gas (petrol) cars, so there is more room for error. We do not recommend other brand turbos. However, if you put in a potentially significant amount of work logging boost and recalibrating the vacuum actuator and/or stop screw, then you might get reasonable results from an aftermarket/rebuilt turbo.