Purchasing Notice: · No installation guides are included, Professional Installation Is Highly Recommended Specification: Type: Exhaust Header Color: Metallic Material: Stainless Steel Finish: Polished Primary Diameter: 1-5/8 in. (42mm) Collector Diameter: 2-1/2 in. (64mm) Head Flange Thickness: 3/8 in. (9.5mm) Pipe Thickness: 16 gauge (1.5mm) Compatible for: for LS motor swap builds for older Chevrolet/GM/Oldsmobile/Buick models Fits GM Gen III/IV 4.8L/5.3L/5.7L/6.0L/6.2L LS engines (LS1/LS2/LS3/LS6/LS7) Package Included: 1x Exhaust Headers Kit. LS Swap Headers Kit for Chevy C10 Chevelle Camaro Caprice LS1 LS2 LS6 LS7 LSX US. · No installation guides are included, Professional Installation Is Highly Recommended. And you can expect all the issues would be resolved ASAP! And I will definitely try my best to provide the best solutions which would meet your satisfactory! Primary Diameter: 1-5/8 in. Collector Diameter: 2-1/2 in. Head Flange Thickness: 3/8 in. Pipe Thickness: 16 gauge (1.5mm). · Metal Gasket Included. · CNC machine flanges with TIG and MIG welded construction. · Engineered and Tested to Exceed Original Equipment Standards and Performance. For LS motor swap builds for older Chevrolet/GM/Oldsmobile/Buick models. Fits GM Gen III/IV 4.8L/5.3L/5.7L/6.0L/6.2L LS engines (LS1/LS2/LS3/LS6/LS7). · Please be sure to check your vehicle with OEM OR SIZE carefully before ordering to avoid unusable. · Vehicle compatibility charts are for REFERENCE ONLY. · Will NOT fit LS4 engines. · Will NOT work on standard SBC or BBC. · If using larger 4L80E or older THM 350/400 automatic transmissions the bellhousing ears may need to be trimmed for proper clearance. · Will NOT install with factory column shift linkage. · May require angled spark plug boots for tight clearance. · Some models may require minor modifications. 1x Exhaust Headers Kit. All accessories are included in the picture. We are a powerful factory producing auto parts, and we have a professional sales and after-sales team that can provide you with excellent products and services. My goal is to make sure you are a happy customer and pleasant shopping with us. We strive to answer all questions and resolve any problems as quickly as possible. Monday-Saturday 9:00-17:00. We stand behind everything that we sell and will do everything possible to assure you are satisfied. Buyers are responsible for the postal cost of returning the items. We must be notified of the intent to return your item within 30 days of receiving the item. 1, Please ask us for return address. · No installation guides are included, highly recommend to seek professional installation. · The color of the actual items may slightly different from the listing images due to different computer screen, thanks for your understanding.