Hey everyone,
I have question about exhaust systems. I'm in the process of buying some dutra duals and i was wondering what i should do for the exhaust system. Power, appearance and cost are all priorities. What should i do? Two into one? dual exhaust? i like the look of dual exahaust but if its not gonna give me any more power or anything like that then i see no reason to pay more for it. What kind of muffler should i use?
My engine is a super six 170.
Thanks everyone,
Allen

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1962 Valiant V-200
170 C.I. Super Six, HEI, Dutra Duals

I was thinking about this yesterday. My thought is to come out of the manifolds with 1 7/8 or 2" pipe then bring them together into a 2 1/4 or 2 1/2" pipe to the muffler. I don't have the duals yet but they are on my list for when I get the car running again.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

Yeah thats what i kinda figured id end up doing as well. I didn't think the dual exhaust thing would be very cost effective. Can anyone recommend a muffler then? i hear the magnaflows are good...
Good luck on the car david.
-Allen

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1962 Valiant V-200
170 C.I. Super Six, HEI, Dutra Duals

I haven't decided on a muffler yet. I have a Flowmaster on the Dakota and it works well for that application. I have plenty of time to decide that issue.

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David Kight
'62 Valiant Signet, White
'98 Dodge Dakota
'06 Jeep Liberty

Growing older is unavoidable but growing up is strictly optional.

Dual exhaust will NOT give you any gains, in fact may give you a power if the pipes are routed incorrectly! Also with a dual exhaust you get alot of drone at highway speed! My SRT-4 has dual exhaust(stock)and it drones like 5 bee hives at once Splitting the exhaust (like with the dutra duals) then bringing them together with a nice y pipe(mandrel bent ONLY!) will give you awesome performance and sound,and less likely to drone!


Unless you really cant stand to hear your exhaust,NEVER put a flowmaster or and baffled muffler on your car! Straight through design is the only way to go! My brother had a set of flowmasters on his car,and we swapped them out for a straight through magnaflow muffler (same case size, and the same inlet/outlet diameter!)then strapped it on a dyno. He picked up 9 RWHP with just a muffler change! I have seen it numerous times,people swap out baffled mufflers for straight through muffler; 9 times out of ten they gain at least 3 h.p!

But a straight through muffler will be much louder! I have owned daily drivers where I ran straight pipes,and it does not bother me,so take that into consideration!

Also if you are going to get an exhaust system you may as well get a 2.5 inch pipe! Especially if it is a crush bent system! MY .02

On my Dart, I was running Dutra duals with dual 2 inch pipes. I had an H-pipe crossover just at the rear of the transmission. The system used two generic "turbo" mufflers. This exhaust system seemed to work very well with a 2 bbl. carburetor, but I often wondered if a single system would work better. One advantage of a single system over a dual is the weight savings of the single pipe system.

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'68 Dodge Dart 4dr Sedan