CNC Intake Manifold Kit Plans for the 1.8L Ecotec

CNC Intake Manifold Kit Plans for the 1.8L Ecotec

This CNC Intake Manifold Kit is the exact design I used to help push my Chevy Cruze to 525 WHP.  That’s 4x the factory horsepower! Designed specifically for the 1.8L Ecotec engine, this downloadable plan set gives you everything you need to machine and fabricate a high-performance intake manifold—without dropping $3,200+ on a billet design (not that they exists).

This isn’t just an STL file. It’s a complete fabrication blueprint combining CNC-ready STL files and laser-cut DXF/AI templates, created for serious builders who want a full-custom setup that flows hard and fits right.

What’s Included:

• ✅ STL files for port-matched intake runners, fuel rail brackets (for standard GM injectors), plenum base, and throttle body flange

• ✅ DXF/AI files for the plenum shell — ready for laser cutting

• ✅ Step-by-step installation + welding video instructions

• ✅ My trusted vendor list for CNC machining and laser cutting

The flange is designed to be CNC machined for a perfect head match, and the plenum base and throttle body mount are STL-based for high precision. The outer plenum shell is laser cut from sheet metal and ready to weld together.

Engine Compatibility:

• 1.8L Ecotec: F18D4, A18XER, 2H0

• 1.6L Turbo Ecotec: Z16LET, Z16LER, A16LET, A16LER

• Fitment: Chevy Cruze, Sonic, Saturn Astra, Vauxhall Astra, Corsa, and Insignia 1.6 Turbo

This intake manifold kit isn’t a toy. It’s a pro-level fabrication plan, tested on the street and strip. Whether you’re chasing boost, building a show-quality bay, or just want something truly custom—you’re covered.

Note: Welding and basic fabrication required. This is a real-world performance part, not a bolt-on shelf product.