NGK

NGK-BPR8EIX (Iridium) 1-Step Colder Spark Plugs (set of 4) - EVO1-8, Galant VR4 4G63T

$90.00 inc. GST

Product details

  • Vendor NGK
  • SKU MK-BPR8EIX4
Description & Specification

Specifications:

  • Thread: 14 mm

  • Reach: 19 mm

  • Hex size: 16 mm

  • Heat range: 8

  • Resistor: Yes

  • Electrode material: Iridium center / Platinum ground

Which NGK Iridium Spark Plug is Right for My EVO?

  • BPR7EIX – OEM Equivalent (Heat Range 7)
    Best for stock to mildly modified EVO1–8 running factory boost or up to ~20 psi. Perfect for daily drivers and spirited weekend use.

  • BPR8EIX – 1 Step Colder (Heat Range 8)
    Ideal for high-boost setups (~20–28 psi), upgraded turbos, or track-day cars. Helps control combustion temps and prevent detonation under sustained load.

  • BPR9EIX – 2 Steps Colder (Heat Range 9)
    Designed for extreme-boost race applications (28+ psi) such as drag or dedicated circuit builds. Best in engines running very high cylinder pressures and advanced timing.

Tip: Always choose heat range based on boost level, tune, and intended use—too cold for your setup can lead to fouling, while too hot can risk detonation.

NGK Spark Plug Comparison – EVO1–8, Galant VR4 (4G63T)

Feature / Spec BPR7EIX (Iridium IX) BPR7ES (Copper) BPR8EIX (Iridium IX – 1 Step Colder) BPR8ES (Copper – 1 Step Colder)
Electrode Material Iridium center, nickel ground Copper core, nickel ground Iridium center, nickel ground Copper core, nickel ground
Center Electrode Diameter 0.6 mm fine-wire 2.5 mm standard 0.6 mm fine-wire 2.5 mm standard
Lifespan ~40,000–50,000 km (high performance use) ~10,000–15,000 km (performance use) ~40,000–50,000 km (high performance use) ~10,000–15,000 km (performance use)
Spark Strength Strong, concentrated spark for improved throttle response Good spark, weaker consistency at high boost Strong, concentrated spark for extreme conditions Good spark, weaker consistency at high boost
Heat Range 7 7 8 (colder) 8 (colder)
Performance Suitability Street & track, mild–moderate mods Budget or temporary replacement High-boost, track, or heavily modified engines High-boost on a budget, frequent changes needed
Gap Stability Excellent – resists wear and erosion Poor – gap widens quickly under boost Excellent – resists wear and erosion Poor – gap widens quickly under boost
Price Range Mid-range Lowest Mid-range Lowest
Best Use Case Tuned EVOs, spirited driving, long service Cheap short-term fix Tuned high-boost EVOs needing detonation control High-boost budget builds, regular replacement needed

NGK BPR7EIX Iridium IX spark plugs (set of 4) for EVO1-8 & Galant VR4 4G63T. Heat range 7, long-lasting high-performance ignition.