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1974-1979 Oldsmobile 98
Headset or Helmet Extension
The Endurance Plus series of valve springs utilizes a specially processed Tool Room Material outer spring for increased endurance/reliability beyond the "SP" series
HVH has over thirty years of head porting
Comes with Viton O-rings and can be used with our filters
Schoenfeld SB Chevy Modified Headers - Spread Port - 1-3/4" - 1-7/8" Tube Diameter UNI-MAG 1974-1979 Oldsmobile 98Ellis Modified Header. Bolts and Gaskets included. Started in 1974, Schoenfeld is known for custom fabricated headers for all forms of circle track racing. Schoenfeld Headers is the worlds largest manufacturer of circle track headers, but they specialize in a variety of high quality exhaust parts, including turn downs, extensions, tubing bends and elbows, race mufflers, insert mufflers, mandrel bends, exhaust reducers, header gaskets, and more.