Feature 1Part Number: Replacement for Mercruiser: 70981A3; Replacement for Mallory Marine: 972808; Replacement for Sierra: 182762; Replacement for GLM: 89070. 2Applicable Model: Exhaust bellows fit for 165/170/3.7L/180/190/470/485/488 manifolds (19801989); For Chevy 305/350/377 (1983up); For Big block 454/502 (1981up); For V6 229/262 (1983up). 3Good Replacement: Designed to meet or exceed original specifications, fine workmanship, wonderful replacement for the previous old or broken one. 4Durable Construction: Manufactured from premium rubber and stainless steel material, wearresistance and rustresistance, having stable performance. 5Easy Installation: Installs on to 3 inch 15 degree center mounted risers with 4 inch elbow. Perfect fitment and durable to use and also can prevent cracking and leaking.Item Type: Exhaust BellowsMaterial: Stainless steel + rubberReplace Part number:Replacement for Mercruiser: 70981A3Replacement for Mallory Marine: 9-72808Replacement for Sierra: 18-2762Replacement for GLM: 89070Application: Mounts on 3in 15 Degree Center Mount Riser with 4in ElbowFitment:For 165/170/3.7L/180/190/470/485/488 manifolds (1980 - 1989)ForChevy305/350/377 (1983 - up)ForBig block454/502 (1981 - up)For V6 229/262 (1983 - up) .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Exhaust BellowNote1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!