HKS General Application M-Series Super Fire Racing Spark Plug - Black Ops Auto Works
HKS General Application M-Series Super Fire Racing Spark Plug - Black Ops Auto Works
Click to zoom in

HKS General Application M-Series Super Fire Racing Spark Plug

HKS
HKS50003-M35IL
4957266720264
Spark Plugs
20+ Units In Stock - Ships Next Business Day
$ 270.00
FREE Ground Shipping!
$ 270.00

SKU: 50003-M35IL | UPC: 4957266720264

HKS General Application M-Series Super Fire Racing Spark Plug M35IL-9

HKS M-Series Super Fire Racing Spark Plug features a 0.35mm fine-wire iridium center electrode for focused spark energy in high-rpm racing applications. Designed for general use in performance Japanese vehicles including Subaru Impreza WRX STI, Toyota MR2 Turbo, and Nissan Silvia models. Delivers stable combustion, quicker throttle response, and reduced misfires under extreme conditions.

Key Features

  • 0.35mm Iridium Center Electrode: Concentrates discharge for reliable ignition at high engine speeds and lean mixtures
  • Platinum Ground Electrode: Resists wear for consistent performance over long racing sessions
  • Special Nickel Plating: Prevents carbon fouling and protects threads for easy removal after use
  • Heat Range 35: Handles high heat loads in turbocharged or supercharged engines without pre-ignition
  • Precision Insulator Design: Ensures optimal spark position and heat dissipation for peak efficiency

Product Notes

  • Gap set to 0.8-0.9mm from factory, verify with engine specs before installation
  • Use anti-seize on threads during install to prevent seizing
  • Ships in protective individual box, one plug per package

Installation Notes

  • Professional installation recommended.
  • Torque to 18-22 ft-lbs using 16mm thin-wall socket
  • Compatible with stock or aftermarket coil-on-plug and distributor systems

This Part Fits

Year Make Model Submodel
2002-2007 Subaru Impreza WRX
2004-2021 Subaru Impreza WRX STI
1989-1999 Toyota MR2 Turbo SW20
1995-2002 Nissan Silvia S14 S15
1999-2002 Nissan Skyline GT-R R34
1989-1998 Mitsubishi Eclipse GSX 2G

Why Choose HKS?

  • Proven in JDM racing series like Super Taikyu and JGTC
  • Manufactured to exacting tolerances for consistent output
  • Engineered specifically for boosted and high-compression setups

Frequently Asked Questions

  • Q: Does this plug fit my Subaru STI?
    A: Yes, direct fit for 2004-2021 Impreza WRX STI EJ25 engines, replaces NGK ILFR6B equivalents
  • Q: What electrode materials are used?
    A: 0.35mm pure iridium center electrode with tapered platinum ground strap for durability
  • Q: What is the warranty?
    A: Limited manufacturer defect warranty, inspect regularly in racing use

Shipping & Handling

  • Method: UPS Ground or USPS Priority
  • Availability: In stock - ships same or next business day
  • Packaging: Individual protective box 3in x 3in x 4in
  • Weight: 0.11 lbs

Request For Information

Have questions about HKS General Application M-Series Super Fire Racing Spark Plug? Fill out the form below and we'll get back to you by the next business day.
Engine

Engine

Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...

View Engine Products
HKS

HKS

HKS Japanese performance parts for Toyota Supra, Nissan Skyline GT-R, Nissan Silvia and 240SX, Subaru WRX and STI, and other JDM platforms are stocked at Black Ops Auto Works. Shop turbo kits, cat back exhaust systems, coilovers, blow off valves, and engine management upgrades for RB26DETT, SR20DET, 2JZ-GTE, and EJ series turbocharged engines. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 607 HKS SKUs across forced induction, exhaust, suspension, and engine management categories. What This Collection Covers HKS has built its reputation on Japanese sport compact and sports car performance since the late 1970s, developing turbo kits, exhaust systems, and suspension for platforms including the Toyota Supra 2JZ-GTE, Nissan Skyline GT-R RB26DETT, Nissan Silvia and 240SX SR20DET, and Subaru WRX and STI EJ and FA series engines. This collection brings together fitment verified HKS pa...

View HKS Products
Ignition

Ignition

Ignition parts keep every cylinder firing on time and every start crisp, and Black Ops Auto Works stocks the full system in one collection. Spark plugs, coil packs, plug wires, distributors, starters, sensors, and glow plugs from NGK, Granatelli, MSD, Ford Performance, Moroso, Mishimoto, HKS, and COBB all live here. Whether you are chasing a weak spark on a daily driver, refreshing a tune-up on an LS or Coyote build, or wiring in a full coil-on-plug conversion, this collection has the OEM-grade replacements and the performance upgrades to keep the mixture lighting off cleanly under boost, high RPM, or heavy load. What Belongs in the Ignition System The ignition system is more than just the spark plug. Every part in this collection plays a role in taking 12-volt battery power, stepping it up to tens of thousands of volts, and delivering that spark to the right cylinder at the right instant. Weakness anywhere in the chain shows up as misfires, hard starts, poor mileage, or a chec...

View Ignition Products
Spark Plugs

Spark Plugs

Spark plugs for cars, trucks, SUVs, and import platforms are stocked at Black Ops Auto Works. Shop iridium spark plugs, laser iridium spark plugs, double platinum spark plugs, nickel spark plugs, and racing spark plugs for LS, LT, HEMI, EcoBoost, Subaru EJ and FA, and import turbo engines. Every product is filterable by heat range, thread size, gap, and vehicle year, make, model, and engine so the correct spark plug ships the first time. Black Ops Auto Works carries 480 spark plug SKUs across every major electrode material and heat range. What This Category Covers Spark plugs ignite the compressed air and fuel mixture in each cylinder, and the correct plug for your engine depends on electrode material, heat range, and thread specification. Choosing the wrong heat range or gap can cause misfires, fouling, or in extreme cases pre-ignition damage. Electrode Materials Iridium and laser iridium plugs use a fine center electrode for a stronger, more consistent spark and the longest se...

View Spark Plugs Products
Military & First Responder Discounts

Military & First Responder Discount Program

Black Ops Auto Works proudly honors active duty military, veterans, National Guard, reserves, police officers, firefighters, and EMTs with an exclusive 5% discount on all performance parts and carbon fiber upgrades. Verify instantly and start saving today.

Learn More & Apply

Your cart

×