I was just browsing around at the local Corvette show (Corvettes at Carlisle if anyone cares) and came across a pair of Siamesed runners I am assuming came off an L98 Vette. They are obviously used but are in excellent condition. My first question is will they work on my stock 305 and what gains (or losses) will I see. My second question is what does everyone think they are worth. They was nobody there at the time so I'm not sure what they are asking. Thanks for the help everyone.

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90 Formula 305 TPI 5 speed
K&N, Dynomax Muffler

 

Yes they will fit.
You should see some high end power improvement, with a slight loss in low end. Maybe not much at first on your relatively unmodified engine, but as you modify, they beocome more important.
I would start off with 1$ and go up!

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'88 RS (originally 2.8)
-350, .040 over, vette alum. L98s, stock tpi.
-305 injectors & chip
-TES headers & edelbrock cat back
-3.73 gears, 700r4.
Best with 2.8-17.4@77mph
Best with 305-15.0@93mph
Best with 356-13.7@101mph
on a 2.050 60 ft.
(Damn the 2.8!)

 

Ok that's what I figured on the performance end of it. I'm planning to port the plenum and possibly do some work to the heads this winter. Would I see greater gains if I did that and less loss in torque? Also would I have to get new gaskets and match them?

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90 Formula 305 TPI 5 speed
K&N, Dynomax Muffler

 

Well the guy said he is asking 200 but I'm sure I could get them for less. They really are in great shape. So I'll see what kind of deal I can make tomarrow if he still has them.

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90 Formula 305 TPI 5 speed
K&N, Dynomax Muffler