A list of 2003 NHRA Pro Stock Bike rules updates:
Page 154 (eff. 1/1/03)
Introduction: Replace second sentence with "Minimum weight at conclusion of run: Harley-Davidson or NHRA-accepted American push rod V-twin up to 160 cid, 550 pounds, including rider; Harley Davidson or NHRA-accepted American push rod V-twin 161 to 200 cid, 600 pounds, including rider;
"
Page 154 (eff. 1/1/03)
Engine: Replace second sentence with "Harley V-twin or NHRA-accepted American push rod V-twin, 45-degree case only, maximum 3,278cc (200cid)." Replace fourth sentence with "NHRA-accepted aftermarket Harley-Davidson or American push rod V-twin engine cases with cylinder angle between 45 and 60 degrees, up to 160 cid, permitted."
Page 155 (eff. 1/1/03)
Fuel System: Replace final sentence with "EFI permitted on certain Harley-Davidson or American push rod V-twin engines accepted by NHRA."
Page 155 (eff. 1/1/03)
Transmission: Replace second sentence with "Transmission must be contained within the stock case, except Harley-Davidson or NHRA-accepted American push rod V-twin."
i would hope they are competitive......the rules do everything but give them a headstart.