AED 1/2" Birchwood Carburetor Spacer - Standard Holley MBASE 1964-1966 GMC G1000 Series

1964-1966 GMC G1000 Series

1986-1994 Pontiac Sunbird

1978-1984 Plymouth Horizon

2-1/2 lb Fire Extinguishers

AED 1/2" Birchwood Carburetor Spacer - Standard Holley MBASE 1964-1966 GMC G1000 SeriesAED 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