The Bagger Nation "Straight Pipes" Adjustment System enables you to center your exhaust within the ports of your stretched fender and bags (dual exhaust) by providing you a slotted muffler mounting bracket that gives you the left-to-right adjustment you need to center the pipes. Another key feature is that this is the only muffler adjustment system that fits securely in the H-D rubber muffler isolator mount. This is important because if the bracket slides in the isolator, your exhaust can slide around inside the exhaust port possibly chipping or, even worse, burning your paint! These brackets are a MUST when using 4.5" exhaust pipes to adjust them to the center. This kit is easy to install and durable. US Patent No. D1,122,084 NOTE: we recommend using brand-new rubber muffler isolators when doing stretched bags to get the proper alignment. H-D part # 65724-85A WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov Prices are subject to change.