Hmmm, so I'm looking over my invoice and see they installed Brisk Racing Silver spark plugs RR14YS.
Apparently they are one step colder than stock.
Anyone ever heard of these spark plugs and are they any good?
they are good but i like ngk 6510
2011 Musang GT 6MT. Ford Racing 4.10 gears, TA Rear End Girdle, Boss 302 intake manifold, O/R x pipe, Ford Racing K springs, upr pro-series lca/uca/mount NGK 6510 gap to 0.32, ID 1000 injectors, KB Boost a pump, Paxton novi2200sl w 3.6 inch pulley 10psi. tuned by lund racing. unknown power.