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Discussion Starter #1
Looking at putting a single turbo on my soon to be new 89 with 331. I want to keep tailpipes out the back for asthetic reasons. Is the 3" downpipe to the y then into 2 2.5" tails enough or do I need to go to 3" tails??
 

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Depending on the turbo and power goal. Is it a stock block 331? If so then the 3"dp and 2.5 cat back is enough.
 

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What is the limit on a 2.5 catback? Seems like 2.5 would be plenty considering you only have a 3" down pipe.
 

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Discussion Starter #4
stock block, so im thinks ng 2.5" is enough until i can upgrade block and then turbo and then injectors and maf and then exhaust lol
 

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Im running a Magnaflow catback with a 3" downpipe. You should be good.
 

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Discussion Starter #6
hows the sound with tails and turbo?
 

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Stockish at idle untill I hit the loud pedal!

I have several vids on streefire.net if you just type in "jturmanator"
 

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Discussion Starter #9
hmmm, might just get one of them vrs 3" tailpipes for now and add 3" mufflers later
 
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