I had 4.10 in it but blew them up on the 4th pass. So I installed a set of 4:30 I had laying around. The tires were M/T ET Street Drag Radials in 275/60/15. I think the car would of been faster with the 4.10 but I never got around to trying a set again. Also my dart had the wrong stall at the time. I had a 9.5 inch converter that only stalled around 4200, the car should of had a 5200 stall converter. Which latter on I added, but never got to race the car before I sold it. Also my car was 100 percent street able