Use with shop air to pinpoint causes of low compression
such as bad valves, worn rings cracked cylinders
14 & 18mm adapters fit almost all engines
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*KMS Club Members Save up to 30% Off everyday. Online or in-store prices are pre-calculated with discounts and are shown online in red. In-store instant savings or prices are shown on each item label. No additional discounts required at checkout. Flyer or eFlyer savings may be greater!