Thunderslide Jet Kit for 1998-2003 Harley-Davidson Sportster 1200 Sport Maverick X XC More riders roll on GDP

More riders roll on GDP Portals than any other portal system

Sportsman 450 (All years)

This will greatly improve the feel of initial power transfer under high load

Defender 1000R

It’ll make sure your UTV is up for big rocks and big jumps—all the stuff that adds up to big fun

Thunderslide Jet Kit for 1998-2003 Harley-Davidson Sportster 1200 Sport Maverick X XC More riders roll on GDPTake your performance to new heights with a Jet Kit for your motorcycle. Increase power and improve performance throughout the entire RPM range while improving throttle response and smoothness. These Jet Kits take the guesswork out of tuning your bike. Whether youre rolling with a stock bike or youve made some modifications our Jet Kit will optimize your air fuel ratio to eliminate rough spots and help you take control of your motorcycles power. You