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Block Fillers

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Hard Blok Engine Block Filler

Toughen up your engine block! Hard Block has the optimum ratio of graded iron for strength and vibration dampening. Its thermal coefficient is nearly identical to cast iron, and also proven to work in aluminum blocks. It won't shrink or pull away from cylinder walls. It is stable when exposed to water, anti-freeze, and high temperatures. It is available in a pre-measured Short Fill (12.5 lb.) container to partially fill the jackets of your street or Oval Track engine, or a Tall Fill (28 lb.) container for drag racing.

4.38 out of 5 stars ( 16 )

$118.99

$143.99

Moroso Engine Block Filler

Moroso engine block filler is designed to fill your block before the machining process Just fill with water, mix, and pour. It has an expansion rate very similar to cast-iron. It helps prevent cylinder walls from cracking, dampens unwanted vibrations, and improves piston ring sealing by keeping the bore round.

4.8 out of 5 stars ( 10 )

$30.99

$89.99

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