hey im runnin a 95 c1500 5.7l with stock single offset in offset out idk what size pipes they are cuz im away at college, i was lookin at gettin a flowmaster 40, dou you all got the delta or just 40 series idk whats better, i wanna get a good sound but not eextremely loud so i dont want the 50 series, i am gonna put an air intake along with it and i saw the 4o series is aluminized, do i just clamp it in or can i weld it with an aluminum or reg welder?