Mig welding 304 ss is fine as long as the gas and wire types recomended by professional welders are adhered to.

304L being softer and easier welding is just a little more insurance that they don't crack during use.

I personnaly have bought weaponR products in the past for a buddy's acura that I worked on and the quality and fitment was good, the performance was similar to the claims they made.

As long as these headers have a decent warranty against cracking along the welds then I wouldn't have any misgivings about installing them.

Now that we have a rep from weaponR on here:

What is the warranty on these headers?


Former owner of '99 CSVT - Silver #222/2760 356/334 wHP/TQ at 10psi on pump gas! See My Mods '05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red '06 Mazda5 Touring, 5spd,MTX, Black