4150 Restrictor Plate Systems

Our 4150 Series Restrictor Plate System offers a one-piece billet design. This billet spacer design is machined with precision in mind allowing the plate to nest tightly in the pocket. The mounting surfaces are decked smooth, ensuring a perfect seal once the carburetor is fastened to the intake manifold.

Most competitor plates are laser cut. While this is a fast and economical way to produce a plate, it’s not a precision component. Typical Laser Jet tolerance is +/-.005.  All of our plates are CNC machined to +/-.001 .  Why is this important? This is huge when dealing with a smaller plate which may have just .005 in plate bore increments. The Laser Jet tolerance of +/-.005 can actually be greater than your desired change in plate bore size. When you make a change with our plate you can rest assured you have made the actual change you desired.   

Each Plate System Includes:

  • 4150 Two Piece Modular Spacer  (Spacer 0.75" overall Height)
  • 20 Restrictor Plates selected for your application
  • Compatible with PerformAIRE and RaceWORKS prediction systems

Click here for available plate sizes and cross to EZPLATE-> Plate Chart

4150 Restrictor Plate Systems

Restrictor Plate Systems - includes 20 plates, click View More to enter plate information and purchase. Spacer is 0.75" tall.

Use Coupon code RPWEATHER at check out,when purchasing with compatible PerformAIRE Weather system for discount!

SHIPS ONLY VIA UPS - Do  NOT selecl other shipping method.

Price: $569.99
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ALT-RPSYS-4150-Size Image Not Available 4150 Restrictor Plate

Individual Plates - Select Size

*** 5 plate minimum order is required ***

SHIPS ONLY VIA UPS - Do  NOT selecl other shipping method.

Price: $19.99
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