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Depends on how much money you got to spend and what your goals are. Probably will need headers and an intake and a dyno tune to get much done. HEI ignition coils and fancy wires doesn't do squat. I custom built my own wires because I needed the length and got a decent deal on wires and the crimpers.
I have a stockish 89 l98 c4.
Flowmasters k and n and hei ignition
Looking for the best bang for the buck power adders can you help?
Long tube headers is the best bang for buck, look for HTC coated headers which will keep the engine bay and floor cool.
I got headman HTC coated headers and they are great, quite cheap too.
TPI engines love headers, will knock almost one second of a quarter mile time.