Empi 3657 Black J-Tubes For Air-cooled Vw Squareback, Fastback & Notchback. J-Tubes Replace Stock Heater Boxes, Eliminating Heater And saving Weight. These Replacement Black J-Tubes Fit Most Street Vw Header Systems. Application: Volkswagen Type 3 Squareback, Fastback, Notchback 1300-1600cc Engines Sold As Pair Note: Empi Black Headers And Mufflers Are Coated With A Layer Of Paint Which Acts As A Rust Inhibitor For Shipping/Storage And Will Burn Off Once They Get Hot. It's Recommended To Clean Off This Coating With A Good Solvent Then Paint With A Quality Hi-Temp Paint. Systems Are Not Warranted Against Rust.