I.S. Customers v2 My car has a 440ci SBF with an I-S single direct port backed by a Phat Jaxx Automotive Powerglide and Full Team Z Motorsports suspension. I run in our local x275 class. The car went 5.18 on a 36 jet at 2935lbs last year.. I sent the direct port in this winter and upgraded solenoids and had it reflowed.. Now the car weighs 2760 and with the freshened direct port I am having a hard time getting down the track… I will update you guys when I get a clean pass with it because I know it will go 4.90s on this 36 jet! -Bryan Dunlap Ron Rhodes
