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Starting this weekend at Atlanta Motor Speedway...

Refresher on the 2015 NASCAR Sprint Cup Series Race Package:
 -- Reduction of horsepower to 725 via tapered spacer
-- Roller valve lifters to replace flat valve lifter
 -- Lower rear differential gear ratios targeting 9,000 RPM
 -- Rear spoiler adjustment to 6 inches high (2014 height: 8 inches)
 -- Optional driver adjustable track bar
 -- 38-inch wide radiator pan
 -- Minimum vehicle weight drops 50 lbs. via ballast reduction (2014 weight: 3,300 w/o driver)
 -- Updated qualifying formats for all tracks
 (2-27-2015)

Should be interesting...  Even though the lifters will only need to last a race weekend, they will get a lot of abuse.   This will be a great lifter development platform...