RaceQuip Fire Retardant Underwear Top - Black - Kids X-Large - 4910906 PT6062 NX4-XTR4 kit features an Xtreme

NX4-XTR4 kit features an Xtreme pressure plate for the most demanding driver

-4AN 45 Degree Male Adapter To 1/8" NPT Male - Black - 823-04-02-2

B015X is an ACT Xtreme pressure plate that uses exclusive diaphragm design to increase clamp load

Your 91 octane results may be higher than listed above

A011 pressure plate features an exclusive diaphragm design to increase clamp load

RaceQuip Fire Retardant Underwear Top - Black - Kids X-Large - 4910906 PT6062 NX4-XTR4 kit features an Xtreme>> CLICK HERE FOR SIZING CHART << RaceQuip SFI 3. 3 rated long underwear tops are knit from a blend of aramid and FRC fabrics to achieve a comfortable fire retardant garment. The properties of this unique fabric structure create a lightweight fabric that performs like Nomex yet is much more cost effective. The Fire Retardant Cotton (FRC) component of the fabric promotes a soft and supple lightweight feel. Since it's hypoallergenic, it won't irritate