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Large 3'' opening
a machined billet filler neck with overflow fitting
thread sealer or silicone should be applied to the bolt threads at these locations
Door Bar Mount
Holley Main Jet Extension 4170BK Large 3'' openingHolley Main Jet Extension 122 5000 Improved Design 2 Per Package Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every NASCAR Cup team and nearly every NHRA Pro Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance
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