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The FAST XR Series ignition coil set is specified for GM LS family engines in many popular generations and is sold as a set of eight for 2005–2015 GM 4.8L, 5.3L, and 6.0L truck applications. The XR coils are built with ultra-pure copper alloy windings and the product notes indicate they provide roughly 15–20% more energy than stock coils, with testing to 8,000+ RPM and support up to high-output applications described in the extended product details.
FAST GM LS 4.8L/5.3L/6.0L/6.2L/7.0L Gen V XR Series Ignition Coil - Set of 8
