The ISM Connect 300 was a NASCAR Cup race held annually at the New Hampshire Motor Speedway. It was the Sylvania 300 from 2003-2015. The race began in 1997 as the CMT 300. Kmart and Dura Lube have also been involved with the race in the past. It had been a playoff race, but was discontinued after 2017 and the playoff race was moved to Las Vegas starting in 2018.
| Year | Winner | ||
|---|---|---|---|
| 2017 | Kyle Busch | Toyota | Joe Gibbs Racing |
| 2016 | Kevin Harvick |
Chevrolet |
Stewart-Haas Racing |
| 2015 | Matt Kenseth |
Toyota |
Joe Gibbs Racing |
| 2014 | Joey Logano |
Ford |
Team Penske |
| 2013 | Matt Kenseth |
Toyota |
Joe Gibbs Racing |
| 2012 | Denny Hamlin |
Toyota |
Joe Gibbs Racing |
| 2011 | Tony Stewart |
Chevrolet |
Stewart-Haas Racing |
| 2010 | Clint Bowyer |
Chevrolet |
Richard Childress Racing |
| 2009 | Mark Martin |
Chevrolet |
Hendrick Motorsports |
| 2008 | Greg Biffle |
Ford |
Roush Fenway Racing |
| 2007 | Clint Bowyer |
Chevrolet |
Richard Childress Racing |
| 2006 | Kevin Harvick |
Chevrolet |
Richard Childress Racing |
| 2005 | Ryan Newman |
Dodge |
Penske Racing |
| 2004 | Kurt Busch |
Ford |
Roush Racing |
| 2003 | Jimmie Johnson |
Chevrolet |
Hendrick Motorsports |
| 2002 | Ryan Newman |
Ford |
Penske Racing |
| 2001 | Robby Gordon |
Chevrolet |
Richard Childress Racing |
| 2000 | Jeff Burton |
Ford |
Roush Racing |
| 1999 | Joe Nemechek |
Chevrolet |
SABCO Racing |
| 1998 | Jeff Gordon |
Chevrolet |
Hendrick Motorsports |
| 1997 | Jeff Gordon |
Chevrolet |
Hendrick Motorsports |