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Thread: Replacing Twice Pipes exhaust! How to go back to stock without buying unnecesary part

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    Default Replacing Twice Pipes exhaust! How to go back to stock without buying unnecesary part

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    My 1972 240z was previously modified with this twice pipe exhaust system which is loud as hell:



    I want to go back to stock so i can use my car as a daily driver and not a racing machine. Just as a normal sedan. Is this what i need to purchase and have installed:


    Motorsport! MSA Premium Exhaust System, 70-8/74 240Z-260Z (for 6-1 Headers) - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts

    or i will only have to buy the exhaust muffler???

    Motorsport! Performance Stainless Steel Muffler - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts

    Can someone please guide me on what i really need?

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    Are you beginning to think you bought the wrong car?
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    '72 240Z(G) 3.2L
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    The twice pipes are not what is making your Z loud it's your muffler(s)
    if a little knowledge can make you dangerous, I'm a little dangerous

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    I don't see any mufflers in the picture. Many people run their cars with no mufflers, you might not have any. The MSA twice-pipe came with mufflers. It might be that installing two simple glass pack mufflers will make it quiet enough.
    1976 280Z, with some minor modifications

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    install muffler(s)

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    Quote Originally Posted by Zed Head View Post
    I don't see any mufflers in the picture. Many people run their cars with no mufflers, you might not have any. The MSA twice-pipe came with mufflers. It might be that installing two simple glass pack mufflers will make it quiet enough.
    Based on the fact that the car has this type of exhaust i would like to know what kind or Brand of muffler i will need to quiet down the car as a normal sedan.

    Would i only have to buy the muffler and the chrome tip? I want a good quality muffler and tip!

    Will this option work? Motorsport! Performance Stainless Steel Muffler - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts

    Please advise!

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    It could be! I would appreciate if you can help me with this issue!

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    You are at a crossroads. You could try additional glasspacks midway in the system, but not sure if it will quiet it down much. You won't beable to find a chambered muffler that will easily mate up with the system you have now. Your best option might be to sell off that system completely and start over with a single pipe system with a premuffler and muffler for quieter results.
    Steve
    71 240z,bw-5sp 2.4-40 over,balanced,e-88,big valves,ported&polished, stage2,header, triple Mikuni's 40's
    3.90 Subaru STI LSD

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    Quote Originally Posted by madkaw View Post
    You are at a crossroads. You could try additional glasspacks midway in the system, but not sure if it will quiet it down much. You won't beable to find a chambered muffler that will easily mate up with the system you have now. Your best option might be to sell off that system completely and start over with a single pipe system with a premuffler and muffler for quieter results.
    Thanks, Which i think i will decide to start over with a single pipe system. Which seller do you recommend?

    Motorsport! MSA Premium Exhaust System, 70-8/74 240Z-260Z (for 6-1 Headers) - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z Parts

    This one is quite expensive and i have Heard the muffler is not high quality.

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    From what I've read over the years, the twice-pipes exhaust provides little benefit under most driving conditions over a large pipe exhaust. There is more pipe surface area to provide friction. It's not a V engine.
    Bryan Pilati
    1971 Datsun 240Z (8/71; 920 paint)
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    I'd just go to a local independent muffler shop, have them install a pipe and muffler. Just explain you want it quiet, and as much ground clearance as possible.

    Stock pipe reduces performance. Installing 2 1/4" pipe and turbo muffler (with an adapter welded to the stock Y pipe) took about 1.2 seconds off my 0 to 60 mph time with no other modifications. And it's not so loud I'd get a ticket.

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    I agree with Stanley. Make it easy on yourself and just go to a local muffler shop. They'll have you in, out, and quiet on the road in no time.
    Dennis
    1971 240Z - Original Owner
    2010 Infiniti G37 Convertible

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    I was going to suggest the same, but he's in Panama and I don't know how things work down there. Probably not a muffler shop every five miles like we have here in the States.
    1976 280Z, with some minor modifications

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    Quote Originally Posted by Zed Head View Post
    I was going to suggest the same, but he's in Panama and I don't know how things work down there. Probably not a muffler shop every five miles like we have here in the States.
    Guys, just this morning i changed all the twice pipes exhaust to a single pipe with muffler and resonator. Nice job and now the car is quiet as i wanted. I paid US$230 plus 7 per cent tax for parts and labour.

    I will post the pictures son. Thanks for your good advice. No more twice pipes exhaust. Really not interested in that kind of drag crap.

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