This carbureted dual plane intake manifold bolts onto GM LS1/LS2/LS6 engines with cathedral port cylinder heads, delivering strong low-end torque while still pulling to 6,500 RPM, with O-ring cylinder head mounting flange gaskets for an OEM-style seal.
Specifications:
- Engine Fitment: GM LS1/LS2/LS6 (Gen III/IV, cathedral port heads)
- Basic Operating RPM Range: 1500-6500
- Manifold Type: Dual Plane
- Flange Style: 4150 Square Bore
- Material: Cast Aluminum, Natural finish
- Height (front): 5.07"; Height (rear): 6.14"
- Port Size: 2.72" x 1"
- Weight: 15.14 lbs.
- Part Number: 300-130
Fits all GM LS Gen III or IV engines with LS1/LS2/LS6-style cathedral port heads and includes mounting bolts and washers. This dual-plane intake manifold is not legal for sale or use on engines with pollution control equipment.
FAQ
What engines fit this intake?
GM LS Gen III or IV engines (LS1/LS2/LS6) with cathedral port cylinder heads.
What RPM range is this intake designed for?
1,500-6,500 RPM.
Is this intake legal for emissions-controlled vehicles?
No, it is not legal for sale or use on engines with pollution control equipment.
What flange does it use?
A 4150 square bore flange.

