![Ngk: Tr6ix Spark Plugs (8) [Camaro Corvette Cts V G8 Ss Gto, Ls] 1](https://directpartshub.shop/wp-content/uploads/2026/05/6ix_plugs_89d3936c-70be-419d-9f23-a493c8001c75-Y8WbsC.tmp_.webp)
Description
Recommended for 8-10psi
8 New NGK Iridium IX Spark Plugs TR6IX # 3689, Iridium IX Plug, 14mm Thread Size, 17.55mm (.691″) Reach, 5/8″ (16mm) Hex Size, Tapered Seat, Resistor, Solid Terminal Nut, Projected Tip, Fine Wire (0.6mm) Iridium Center Electrode, Tapered Cut Ground Electrode, .040″ (1.016mm) Gap, Heat Range 6
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