SKU: HVHSS4150-1N
MPN: SS4150-1N
The 1in Super Sucker Carb. Spacer Nylon - 4150 from HIGH VELOCITY HEADS is a precision carburetor spacer designed for square-bore four-barrel carburetors commonly found on small-block and mid-size V8 engines. Built for mechanics and enthusiasts seeking improved idle quality, cooler fuel charge temperatures, and optimized carburetor mounting geometry, this spacer serves as a critical intermediate component between the intake manifold and carb base. Whether you're dialing in a street engine, trail rig, or weekend racer, proper spacer selection directly impacts cold-start behavior, fuel atomization, and overall drivability.
Constructed from reinforced nylon, this one-inch spacer provides thermal insulation that slows heat transfer from the manifold to the fuel bowl, a key advantage in high-ambient conditions or boosted applications where fuel puddling causes hesitation. The 4150 bore pattern accommodates standard Holley and compatible square-bore carburetors, with four mounting holes machined to OEM specifications for secure installation. The 0.99 lb weight adds negligible rotating mass while the compact 6.55 x 2.3 x 8.45 inch profile ensures fitment in tight engine bays without requiring custom hood clearance modifications. Nylon material resists corrosion, fuel soak-through, and thermal cycling better than inferior thermoplastics, extending service life across multiple seasons of operation.
This spacer is ideal for carbureted small-block Chevys, Fords, and Mopars running street or strip duty where consistent fuel metering matters. Installation requires only hand tools—simply unbolt the carburetor, install the spacer with new gaskets (top and bottom), and re-torque to 15–25 ft-lbs. Verify that your intake manifold studs extend through the spacer thickness and that no fuel line routing conflicts occur before final assembly. Pair this with quality fuel line rerouting to avoid vapor lock, and you'll notice immediate improvements in idle stability and throttle response, especially after engine warm-up.
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