Performance Ignition Coils & Spark Plugs
Ignition is the single most overlooked tuning component. When you add boost, raise compression, or run alternative fuels (E85, methanol), the factory ignition system runs out of energy before the cylinder fully ignites — causing misfires, loss of power, and pre-ignition. SP Engineering carries OE-replacement and high-output ignition components for street, track and high-boost builds.
Top Ignition Brands We Carry
NGK (Iridium IX, Iridium MAX, Racing R, BKR, ILZKR), Denso (IK Iridium, IT Iridium TT, Racing), Okada Projects (Plasma Direct, Plasma Booster), MSD Ignition (Blaster Coil, Pro-Mag, 6AL), Beru (Ultra-X, Silver Pulse), HKS (Super Fire, M-Spec), AEM (High Output IGBT, Smart Coil), Bosch (Premium, Iridium), Champion, Splitfire, Brisk Premium Racing, ACL Race.
Popular Vehicle Fitments
Nissan GT-R R35 VR38, R32–R34 RB26, Silvia SR20DET, 350Z VQ35, 370Z VQ37; Toyota Supra A80 2JZ-GTE, A90 B58, GR86; Honda Civic K20/K24, S2000 F20C/F22C, NSX; Mazda RX-7 13B, RX-8 Renesis (twin-coil), Miata; Subaru WRX/STI EJ20/EJ25/FA20; Mitsubishi Evo 4G63; BMW N54/N55/N20/S55/B58; Audi 1.8T, 2.0T TSI; VW MK4–MK7 1.8T/2.0T.
When to Upgrade Coils & Plugs
Stock coils are usually adequate to ~400whp on most platforms. Above that, upgrade to high-energy coils (Okada Plasma Direct, MSD Blaster, AEM Smart Coil). Step down plug heat range one step for every 75–100hp added (e.g., NGK 7 to NGK 8 to NGK 9). Tight gap (0.022–0.026 inches) prevents blow-out under high boost. Refresh plugs every 10,000–20,000 miles for boosted cars.
Free Ignition Setup Help
Email sales@sp-power.com with year/make/model, current power, fuel grade and target power. We'll recommend coil packs, plug heat range and gap.
SP Engineering — Engine specialists since 1996.
