DynoMax® Race Team Claims 4 of the Top 5 Spots at ULTRA4 MetalCloak Stampede Race

DynoMax’s Loren Healy, Shannon Campbell, Wayland Campbell & Levi Shirley Finish in Top Five of Ultra4 Title Race; Shawn Rants & Justin Hall Secure One-Two Spots in 4500 Race

Monroe, MI, May 15, 2015 – Team DynoMax swept four of the top five spots at the ULTRA4 MetalCloak Stampede at Prairie City State Vehicular Recreation Area, Calif., this past weekend. Loren Healy finished first, Shannon Campbell second, Wayland Campbell third and Levi Shirley fifth during the weekend’s main ULTRA4 4400 series race. In the 4500 series race, DynoMax drivers Shawn Rants took first and Justin Hall placed second.

“The top five drivers faced some intense racing at the MetalCloak Stampede, finishing within seconds of each other rather than within minutes like the other races in the series,” said Chris Gauss, director of performance products. “It was great to see our drivers nearly sweep the podium. It’s going to be an exciting 2015 ULTRA4 season!”

In true ULTRA4 racing action, Shirley blew his engine during the open practice session and was able to do a complete motor swap with the help of Tilden Motorsports/Pacific Fab. Shirley started the race in the 11th spot, and worked his way to fourth before getting bounced to fifth as his rig started acting up again.

As “The Official Performance Exhaust of ULTRA4 Racing,” DynoMax performance exhaust has powered the past six King of the Hammers champions across the finish line. The ULTRA4 MetalCloak Stampede features rock obstacles, hairpin turns, high-speed passes and a two-mile course that’s completely visible to attendees. More than 90 teams competed in this past weekend’s events.

Most of the participating teams are running the brand’s popular Race Bullet muffler. The Race Bullet muffler features a compact, round, straight-through design for maximum exhaust flow and power. The Race Bullet muffler features an aluminized or stainless steel design for longer life, and can flow in any direction. It is ideal for tight clearance installations, is available in as small as 9-in. overall length and is lightweight.

For more information about ULTRA4 racing, please visit

Manufactured and marketed by Tenneco, DynoMax is one of North America’s leading brands of dyno-proven exhaust technologies for late-model and classic muscle cars, diesel and gas trucks and SUVs.

To learn more about DynoMax Performance Exhaust products, please visit, contact your nearest DynoMax supplier or call 1-734-384-7806. For the name and location of your nearest DynoMax retailer, check out the Dealer Locator at

Tenneco is an $8.4 billion global manufacturing company with headquarters in Lake Forest, Illinois and approximately 29,000 employees worldwide. Tenneco is one of the world’s largest designers, manufacturers and marketers of clean air and ride performance products and systems for automotive, commercial truck, and off-highway original equipment markets, and the aftermarket. Tenneco’s principal brand names are Monroe®, Walker®, XNOx® and Clevite®Elastomer.

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