Kelford Barra Extreme Racing Spring | Retainer Kit KVS40-EXTREME

150lb seat pressure at 38.10mm, 330lb @ 12.4mm Coil bind at 24.5mm.

KVS40-Extreme FORD 4.0L 6CYL (BARRA). PACALOY Beehive valve spring and Titanium retainer set for Extreme engines running big boost and RPM. 150lb seat pressure at 38.10mm, 330lb @ 12.4mm Coil bind at 24.5mm.