981 GT4 & Spyder - Power Kit Stage 3 & 3+

Regular price $11,670.00

Shipping calculated at checkout.

Stage 3 Power Kit is the final stage of easy & simple bolt on power for your 3.8 GT4 or Boxster Spyder. This kit is a true GT3 killer. Very linear and smooth power & torque deliver all the way to the raised redline of 7800 rpm. With the introduction of the Dundon intake runner, engineered around the 991 GT3 intake, this package unleashes the full power potential of the 3.8 liter. Fully compatible with GT4 Clubsport race cars as well.

200 Cell Catalyst option is available with upgrade to Stage 2+ Street Version with GT3 Muffler adapter. GT3 muffler sold separately. GT3 Muffler Adapter includes valves for use of upper and lower exhaust ports of any GT3 muffler, OEM or aftermarket. Stage 2+ Race Version is also available without catalyst with exhaust valves.

Stage 3 Kit Includes:

  • BMC Racing Air Filters

  • IPD Competition Intake Plenum

  • GT3 82mm Throttle Body

  • Dundon Race Headers (Catless Only)

  • Dundon Intake Runners

  • Cobb Accessport V3 with SPM Stage 3 ProTune

Stage 3+ Includes:

  • All Stage 3 Kit Parts

  • GT3 Muffler Adapter Kit with Valves

  • Optional: Street Version (200 Cell Cats)

  • Optional: Race Version (No Cats)

Conservatively we see gains of over 70 whp peak gains at 5000 rpm & over 70 lb ft of wheel torque gains in below 4000 rpm. More with the Stage 3+ Kit utilizing GT3 Muffler.