Need flowmasters for my HP 390 67'coupe What size do i need?
Flowmasters???
Feb 29, 2004
3 Replies
First reply
try the American thunder 3" pipe sys. and new super 40 flowmaster it would be perfect for your 67'coupe
Read the full reply
Depends on what size exhaust piping your car currently has. Stock was, I'm guessing, probably 2 1/4". But someone over the years might have upgraded the exhaust system and went with 2 1/2", or larger. Take it to muffler shop, have them size it up for you.
Patrick '93 Cobra '83 LTD
3" is overkill.
2.5" duals would be perfect.
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-ERIC
89 5.0 LX Vert w/93 Cobra long block, GT-40 heads, Unknown Camshaft(??), HyperTech Chip, 73mm C&L MAF, BBK 2.5" O/R H-pipe, Flowmaster 40 Series Deltas, King Cobra Clutch Set, BBK Strut Tower Brace, Poly bushings.
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