The S-Type II systems use an advanced muffler design to eliminate sound frequencies are often associated with resonance or drone
Comes with all necessary hardware and easy to follow instructions
We are especially proud to introduce our own ultra-premium springs built from CrSi wire and featuring 530 lb/in front and 130 lb/in linear rates
the SB044 is cold formed to better resist torsional fatigue and retain its "memory" far longer than the hot-formed bars used by many competitors
NOTE: This part was designed to be used with a TWO PIECE DRIVESHAFT
Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 1982-ford-f-150 The S-Type II systems usePROFORM Wedge Locking Header Bolts ELIMINATE the need to constantly re tighten collector bolts, and without the need for clips, pins, racing wire, chemicals or gunk. The secret is in the Wedge Locking Washer's super hardened external teeth that "bite" into the bottom of the bolt head and the top flange surface. Vibrations that normally cause other bolts to loosen, are blocked by the wedge locking action that uses tension, instead of friction to stay