Proform Complete Engine Freeze Plug Kit - Small Block Chevy 400 4087ADUBK The 20-121 should be used

The 20-121 should be used in conjunction with transmission kickdown / throttle cable brackets such as Holley PN 20-95 (steel) or the Holley PN 20-112 and 20-119 (aluminum) brackets

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Proform Complete Engine Freeze Plug Kit - Small Block Chevy 400 4087ADUBK The 20-121 should be usedAvoid corrosion in your engine and replace your rusty freeze plugs with PROFORM's durable brass freeze plug kits. All necessary plugs are included for one complete engine block. Made in USA. Product Description: Freeze Plug Complete Engine Brass Natural Small Block Chevy 400 PROFORM invites racers to experience the strength, innovation, and power behind the PROFORM brand. PROFORM manufactures Parts that Perform! We feature PROFORM Performance Parts,