Nitrous Express 4150 Gemini Pro-Power Alcohol Nitrous Kit (100-500HP) w/10lb Bottle (60545-10) 40040 The biggest increase came from

The biggest increase came from enlarging the upper airbox lids

In the span of about 5 years

The soft urethane construction always goes back to its original form so you will never deform the bump seal

13 whp and 16 ft/lbs of tq at 4400RPM

1999-2005 Volkswagen Golf / Jetta I4-2

Nitrous Express 4150 Gemini Pro-Power Alcohol Nitrous Kit (100-500HP) w/10lb Bottle (60545-10) 40040 The biggest increase came fromThe Gemini plate system is the most technically advanced single stage plate ever designed. The unique direct port pattern assures you perfect nitrous fuel distribution. It solves problems commonly found on single plane manifolds, particularly small and big block Fords. This new innovation provides superior distribution and outstanding atomization. With no spray bars to sag, split, block airflow, or damage this is truly the Next Generation in nitrous