Holley Mid-Rise Plenum Base Adapter Kit - GM LS1/LS2/LS6 300-267

The Modular Mid-Rise intake utilizes the popular Holley LS1/LS2/LS6 cathedral port Mid-Rise 2 x 4 intake manifold along with a plenum base adapter and a Holley 92MM EFI plenum top which converts it into a Mid-Rise EFI intake manifold.

For use with LS Dual Plane Mid-Rise intake manifold base to adapt to modular tops.

NOTES: Holley EFI LS main harnesses have a map sensor connecter designed for use with an LS1/2 style map sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold.

Features:

• Provides great performance to 6500 rpm for street/strip performance applications while providing the look of a racing EFI intake manifold
• Unique modular design allows the combination of a traditional dual-plane layout with an EFI manifold plenum to produce great mid-range torque without compromising top end power
• Great for supercharged or turbocharged engines
• Power band from 1500-6500 rpm
• May require an aftermarket hood for some vehicle applications.
• Cast aluminum construction
• Intended for use on all GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads (recalibration of the ECU may be required when using this intake manifold design with OE ECU).

Specs: