Coupons for
MADDOX Combustion Leak Detector – Item 64814
This combustion leak detector quickly diagnoses combustion gas leaks brought on by head gaskets, cylinder heads and engine block leaks. The tester fluid changes color when exposed to combustion gases trapped in the vehicle’s coolant.
Compare our price of $37.99 to LISLE at $44.99 (model number: 75500). Save 38% by shopping at Harbor Freight.
*LIMIT 1 usage per customer per day. Valid in-store and online while supplies last. Coupon is valid on prior purchases within 30 days of the original purchase date. Digital coupon adjustment must be made in-store. Nontransferable. Original coupon must be presented. Other restrictions may apply.




















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