AED 1" Birchwood Carburetor Spacer - Standard Holley SC04201 The Pumper system and helmet

The Pumper system and helmet are not included

Simpson / Shoei Helmets

Boot Cuff Legs

Silver under 940000

AED 1" Birchwood Carburetor Spacer - Standard Holley SC04201 The Pumper system and helmetAED Carburetor Spacers offer many distinct advantages that are worth mentioning. Besides traditional tuning changes in plenum volume which can improve torque and power output, Birchwood is a great thermal barrier. By keeping fuel bowls cool you get a noticeable increase in fuel density, resulting in a better charge available for combustion. Results on the dyno of up to 20 horsepower. AED originally designed these spacers for racing but soon found out