HKS M-Series Super Fire Racing Spark Plug Heat Range 9 - 1 Piece Performance Cooling Systems Spring Rates: Front: 10kg/mm |

Spring Rates: Front: 10kg/mm | Rear: 8kg/mm

Engine air filter assembly (1 unit)

Precision TIG-assembled and high-quality workmanship

Factory-calibrated sensor element - Maintains precise readings for optimal fuel timing and emissions control

Configuration: Straight tubing

HKS M-Series Super Fire Racing Spark Plug Heat Range 9 - 1 Piece Performance Cooling Systems Spring Rates: Front: 10kg/mm |Specifications 0. 6mm Iridium Alloy Center ElectrodeIridium Alloy Center Electrode reduces voltage requirement as well as improving ignition performance and durability. Outer Electrode with Platinum ChipThe Outer Electrode incorporates a square platinum chip which improves urability, and when combined with the iridium center electrode boosts ignition performance. The Outer Electrode features a shortened tip design and tapered shape while maintaining