Proform Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 66752 1978-ford-e-150-econoline-esi4659425 Dyno-Proven Gains up to +16

Dyno-Proven Gains up to +16 HP and +42 Lbs

The steel sway bar mounting brackets bolt into the factory sway bar mounting holes under the front frame rails and the sway bar links attach to the stock mounts on the differential housing

Up To 1000 Lbs Of Load Leveling Capacity Do Not Exceed Vehicle GVWR

"name": "What is the difference between these 1-7/8\" headers and the 2\" headers (25-1061) for the CT5-V Blackwing

Before any design goes into production it goes through rigorous tests that simulate severe driving conditions

Proform Fits GM BB 396-502 exc 348 and 409, Ford 5.0L, SB 289-302-351W, Mopar 413 66752 1978-ford-e-150-econoline-esi4659425 Dyno-Proven Gains up to +16PROFORM 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