For High Horsepower application get the Anti-Roll Bar with billet arms. These TRZ kits are unwelded. Constructed of chrome-moly making them strong as well as light. With a 1 5/8" diameter bar the ARB will keep your launches strait with more effcient weight transfer and no body roll. All TRZ Anti-Roll Bars come with Chrome-molly teflon lined rod-ends. Welds between stock frame rails or rear cage downbars.