VW MK1 STAGE 1 PORTED INTAKE MANIFOLD
Why the VW MK1(1976-1984) intake manifolds need porting:
As Noted in Greg Raven's "VW Performance Handbook" the intake manifold is the biggest single intake restriction of the engine setup.
Customer Feedback -
My ported intake made it run sooooo much smoother. Very impressed. Great improvement.
Stage III Ported MK1 Intake Manifold - Porting begins with porting the intake to Stage I ported intake manifold level, balanced flow between each runner then cut off the top of the plenum and port the runners and the inside of the short turn radius area.
The Stage 1 and Stage 3 intake manifolds are gasket matched to the factory gasket. The Stage 3 and Stage 1 ported intakes both fit the same stock gasket. Customers with modified cylinder heads may send a gasket template so that the manifold can be ported to match.
All New 3D printed CIS lower air box with 3" inlet vs sock 2.25". We use the stock location under the radiator to connect to the front of the car so the risk of hydro-lock is no more than a stock factory setup. All high temp components used in construction. Kit includes a 3D printed lower elbow that replaces the factory under radiator plastic elbow. A 3" hose with clamps and a replacement CIS lower air box included. The factory lower air box 2.25" inlet is removed and a new 3" 3D printed inlet grafted on. The kit fits in the factory location, with no modifications to CIS needed.
Checkout the research page for Dyno test results Compare lower intake air boxes
Kit Components: 3d Printed lower air box- fits in factory location. 3D printed elbow - replaces factory elbow below radiator. Intake hose to connect the elbow and the lower air box.
Stage I - For street applications. for best results, 268 cam or larger, dual outlet manifold or headers recommended. No loss of low end power, good mid-range gains. 9% more flow over stock. 7 HP gains depending of other modifications.
Stage I Plus - For hot street, boosted and racing applications, mid to high rpm gains. For best results use with modified head, cam and exhaust. 15% more flow over stock. More than 7 HP gains depending of other modifications. Extensive porting.
Stage 3 ported intake for Digifant 1 and Digifant 2 cars. Fits Corrado G60
Fits 2.0 liter engines. 10% increase in flow, balanced flow between runners. 20HP gain at 3,000 RPMS