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If you’re after a significant increase in horsepower and torque levels but aren’t sure of how to go about it, Holley Gen 3 Dominator Black Billet 4 Hole Spacers are a great, under-the-radar way to do so. They allow you to space the carburetor above the intake flange to increase plenum area. Standing 1.5” tall, they’re made of 6061-T6 anodized aluminum and are available for 2”, 2.125” and up to 2.4” bore sizes.
Not only do they increase the plenum area, but they’ve been designed to decrease reversion and enhance fuel atomization for top performance marks. Tapered to boost airflow, your Holley Gen 3 Dominator Black Billet 4 Hole Spacer is supported by a limited lifetime warranty.