Fact Sheet
2015 Rules Package

Nearly 60 different enhancements / updates have been made to the NASCAR national series rules packages for 2015 in the following areas:
New Rules, with one or more of the following goals in mind: enriched competition, improved safety, reduced cost, enhanced product relevance and environmental (green) improvements.
Enhanced Enforcement of Existing Rules
New Officiating Processes
Newly Approved Parts
Updated Business Processes

The following are among the significant updates to the competition package.
Testing
There will be a NASCAR-mandated ban on all team-initiated private testing in 2015
Teams will be invited to participate in NASCAR / Goodyear tests
NASCAR will not conduct a test at Daytona International Speedway prior to the Daytona 500

Rules
2015 NASCAR Sprint Cup Series Race Package includes
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
Rain tires on road courses, similar to rules in place for the NASCAR XFINITY Series and NASCAR Camping World Truck Series; mandatory wipers, defogger and rear flashing rain light installed for the event weekend

New Officiating Processes
Data Log and Capture System for pre-race inspections
Automated pit road officiating at race events

Newly Approved Parts
Revised brake calipers

Updated Business Processes
Electronic rule book
New parts approval process