440 exhaust system

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chad72duster

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Just want some opinions .

Situation Mild 440 with 480 lift cam kb flat tops and cast heads 2.14 1.81 valves running out TRI Ys Into 2 1/4 pipes.The tranny is a street fighter and the car has 3:55 gears.

How much gain if any would 2 1/2 or 3 inch pipes give me. The 2 1/4 exhaust on the car is good we are just wondering if it would be worth it in performance as compared to cost.

Any suggestions
 
2.5" would be good, 3" may be over kill. I dont know how much gain you'll see over the 2.25 though.
 
If your current exhaust system is in good sgape, keep it. I don't think you'll see any really appreciable HP gains for the dollars spent. Once this system goes, then put on the 2 1/2" pipes.
 
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