SKUNK2 Exhaust Manifold Alpha Series B

Skunk2 Alpha exhaust headers feature equally-length stepped primary tubes, sequentially matched in a 4-2-1 Tri-Y design that terminates in a truly fused header that features a 2.5-inch flange. The Skunk2 Alpha Manifold also includes an 02 sensor keyer for OEM or aftermarket lambda sensors.
Each manifold is constructed from stainless steel. The Skunk2 Alpha B-Series manifold also includes a ring gasket and an exhaust flange. This included flange can be used as an option to weld the Alpha manifold to an aftermarket exhaust.
These features, combined with Skunk2's unique design specifications, provide an extremely wide powerband that can be applied to a wide range of engine sizes and configurations. By resizing the diameter of the primary tubes, Skunk2 is able to maintain the highest possible exhaust gas velocity throughout the manifold, which dramatically improves mid-range power.

Skunk2 Alpha Series exhaust headers deliver the perfect combination of high-rev power without sacrificing mid-range performance or throttle response.

Built on the high performance MegaPower model and used for years by top competition teams, Skunk2's Alpha Exhaust Headers utilize many of the same design features and technology.

The Alpha Series aims to make race-proven design more affordable and accessible for everyday enthusiasts. New manufacturing techniques allow this to be done at a lower overall cost, making the technology accessible to everyone.

All Alpha Skunk2 headers are designed to optimize exhaust gas flow and increase horsepower and torque throughout the power band. This unique design is the result of over a decade of racing experience, combined with computer modeling and extensive dynamic testing.

Remark:
- Does not fit OEM catalyst without modifications.
- Includes seal.
- Eliminates the catalytic converter.
- Thread for O2 sensor M18 x 1.5
- Requires a custom exhaust intermediate to link to an OEM line
- Not compatible with Type R transmission stiffener. Modification to that of a GSR required