2003-2004 Mustang SVT Cobra MSD 4.6L 4V Coil Packs
Get a hotter spark to increase performance and throttle response in your 1999-2014 Mustang 4V engine! The housing and installation of MSD's Blaster Coil-on-Plugs are the same as the factory, but that's where the similarity ends. Inside the red MSD housing, engineers spec'd better material to assemble the primary and secondary windings. There is also patented dual magnet technology to step up the output. The Coil-on-Plug design puts the spark energy right out of the coil and across the plug gap to improve the combustion and output of the engine.
2003-2004 Mustang SVT Cobra Motorcraft SP-471 Spark Plugs
The factory Motorcraft spark plugs are designed to a very long time but eventually they can start to get worn. Worn spark plugs can cause misfires, detonations and poor gas mileage. Replace those old plugs with new Motorcraft replacements. They will get your engine running back at top shape! Motorcraft cooper core spark plugs are designed to superbly conduct electricity and be durable enough to withstand everyday use!
Installed the new coil packs and plugs in my '03 Mach 1 this week. Really smoothed out the idle and the hesitation at low rpm in 5th. Exhaust "pop" at idle is gone now too, running great again. Easy install, less than an hour for the entire job.