All glasspacks are individually inspected to insure the highest quality. Our unique core design is unmatched in the industry, making the Jones' Thunderbolt glasspack the product you can buy with confidence! Design features include high temperature wrap, 15 gauge casing, 16 gauge AKDQ nipples with consistently accurate angles in a variety of sizes. All powerpacks by Jones Exhaust are aluminized including cores. And they are made in the USA. Jones Exhaust Systems is dedicated to designing and producing high quality exhaust components at competitive prices, and providing industry leading customer service. This is supported by over 32 years of industry experience. Jones' line of chrome, gold and stainless steel tips is one of the largest lines offered by any manufactures. Jones' stainless line alone has 46 part numbers. Jones' products are produced from plating quality (PQ) tubing, inspected to meet rigid specifications, and manufactured with state-of-the-art quality control.