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Message: <blockquote data-quote="cobraracer46" data-source="post: 1206138" data-attributes="member: 18298"><p>Aftermarket coils for modular mustangs are a waste of money as they are worth no power.  On the other hand, Swapping out the spark plugs and running a smaller than stock gap is a benefit  on the blown cars. On my car, at over 12 psi of boost, the spark would blow out and as a fix, the plugs were swapped to NGK Tr6 units that were 1 range colder than stock and gapped to .029.  No plug will add power and certainly no aftermarket coil will ad power. The Stock Motorcraft coils on my 2001 cobra have proven to be reliable.   Stock Motorcraft coils are  the way to go in my opinion.</p></blockquote><p></p>