The SP-546 is primarily utilized as a critical ignition upgrade or maintenance replacement for Ford, Lincoln, and Mercury gasoline engines, most notably the prominent 3-Valve Modular V8 and V10 Triton engines (5.4L and 6.8L).
Key compatible vehicle lineups include:
• Ford F-Series Trucks: F-150, F-250, F-350, F-450, and F-550 Super Duty (2004–2010 models).
• Ford Full-Size SUVs: Ford Expedition (2005–2008 models).
• Luxury Lineups: Lincoln Navigator and Lincoln Mark LT.