Harbor Freight Tools


Deluxe Compression Test Kit, 10 Piece

Check valves and rings, perform carbon buildup inspection and test for late timing on popular Domestic, European, Asian vehicles.

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The MADDOX®, 10 Piece Deluxe Compression Test Kit is a cut above the rest. This complete kit includes everything necessary for checking engine compression and diagnosing problems with valves, rings, carbon buildup and late timing. Includes a full range of accessories for testing most Domestic, European, Asian vehicles.

  • Adapters for most vehicles (straight, angled, M10, M12, M14, M18)
  • 2.5 in. gauge dual scale gauge measures 0-300 PSI / 0-2100 kPa
  • Comes with 25 in. extension hose, straight and angled fittings and rubberized gauge protector

Accessories Included
2.5 in. gauge with rubberized protector, 8 in. deep - 14mm connector, 5 in. flexible Ford Triton 16mm, 12 in. flexible -14mm standard, 12 in. flexible -14mm long reach, M10, M12, M14, M18 thread adapters,SCHRADER valves, O-rings, SCHRADER tool,sturdy case
Hose Length
14 in.
Shipping Weight
4.76 lb.
Working pressure (psi)
0-300 PSI / 0-2100 kPa
CA Residents
Warning - Prop 65 Info
Note: Specifications are approximate and subject to change

We guarantee this product to be free from defects in materials and workmanship 90 days from the date of purchase. Limitations apply.