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.

3" case are popular on import cars and farm tractors, 3 1/2" are the most popular size for cars and small pickups (all 3 1/2" straights have 2" cores), 4" are perfect for heavy duty trucks and high performance engines and 5" round are made for heavy duty truck mufflers.

Jones powerpacks are great for dual exhaust behind emission systems on late model applications. 3 1/2" case is the most popular size for cars and pickups (all 3 1/2" straights have 2" cores) and 4" are perfect for heavy duty trucks and high performance engines.

And Jones turbopacks quieter than a glasspack, for that "mellow sound". Great for foreign cars or vehicles with limited space but still want the turbo sound.