Holley EFI Throttle Position Sensor - 2 bbl. TBI (502-3/502-4/502-5/502-6/502-7/502-8) 4 bbl. Pro-Jection (504-1/504-2/504-11/504-12/504-13/504-21/504-23) H774009 All BBK mid pipes feature

All BBK mid pipes feature ball and socket style connectors for simple installation and adjustment for good ground clearance

Large Volume Super 40 Muffler

1 mm Reach

1: 1 linkage ratio 1-11/16" throttle bore size

Holley EFI Throttle Position Sensor - 2 bbl. TBI (502-3/502-4/502-5/502-6/502-7/502-8) 4 bbl. Pro-Jection (504-1/504-2/504-11/504-12/504-13/504-21/504-23) H774009 All BBK mid pipes featureHolley is quickly becoming The New Standard In EFI! Holley's HP ECU is standard equipment on the 2013 2014 Chevrolet COPO Camaro and Holley's EFI throttle body powers every NASCAR Cup Series team. Top racers are making the switch to Holley EFI every day. Racers like Tom Bailey who set three new records and took the overall event win on the 2013 Hot Rod Magazine Drag Week and John Scali who used it to win the 2013 JEGS All Star race. But that's not