GRP Connecting Rods www.grpconrods.com +1 303 935 7565 333 W. 48th Ave., Denver, CO, 80216, USA GRP Connecting Rods www.grpconrods.com +1 303 935 7565 333 W. 48th Ave., Denver, CO, 80216, USA GRP connecting rods, a world leader in manufacturing billet aluminum and billet titanium connecting rods, is celebrating its 17th year in Denver, Colorado. Our climate controlled shop employs 13 people in both product development and manufacturing. GRP connecting rods continues to supply high quality billet aluminum connecting rods for some of the fastest race engines in the world. Contact Us Contact Us Latest News