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    #1

    Sports Exhaust Manifold

    I heard a colleagues stag which has a super roar when accelerating, much better than mine.
    Was curious what I can do to improve the Stag Roar on my car.

    For info, I have a 1973 Stag Automatic. it is fitted with a Stainless Steel exhaust system with the
    standard exhaust manifold fitted.

    My first question is would I hear a significant difference in sound if I just replaced the exhaust
    manifold with a sports manifold?

    I have seem a Phoniox manifold available. Is this the main model or are there alternatives that I
    should consider?

    Look forward to any comments and suggestions on this point

    Kind regards

    Steve
    Tags: None
    #2
    Tony Harts straight through silencers will give a better sound. Manifold changes are not worth the pain unless you have proper EFI, imho

    Comment

      #3
      large bore tailpipes make hairs stand up on my neck at >5k rpm

      https://youtu.be/Y9jTkGAv9cc?t=47

      Last edited by richardthestag; 27 June 2019, 10:40.
      Stags and Range Rover Classics - I must be a loony

      Comment

        #4
        That’s driving it as it should be driven
        • Likes 1

        Comment

          #5
          Fitted stainless manifolds to my car from R B, much faster, best mod for power I've done. Slightly better sound to.

          Comment

            #6
            my car was quite like a jag when I fist got changed exhust for ss and got straight through boxes . not the same car at all love the sound

            Comment

              #7
              Tubular manifolds (Phoenix) Tony’s straight through boxes, stainless rest of system & large bore exhaust tailpipes - best sound available on an otherwise standard Stag I think and have to disagree with John, the tubulars are worth it but only if you have the straight through boxes too...

              Cheers
              Mike

              Comment

                #8
                Travelling at the moment with limited access to Internet hence the late response

                Thanks for the suggestions. Looks like the Tony's Straight Through boxes may give me what I want.
                Will try this before the sports manifold as this seems less effort.

                How much cutting to the existing exhaust is required to fit the straight through boxes?
                Any tips I need to know?

                Thanks to all for the responses. Really like the sound on the video above, cool

                Comment

                  #9
                  No cutting needed, they are a straight swap. An incidental advantage is that they have heat shields on top which the SS ones I had didn’t, certainly less heat inside car now.

                  Comment

                    #10
                    Originally posted by KOY 23 View Post
                    No cutting needed, they are a straight swap. An incidental advantage is that they have heat shields on top which the SS ones I had didn’t, certainly less heat inside car now.
                    John

                    does the heat shields make much off a difference ? to the temp inside the car

                    thanks Dave

                    Comment

                      #11
                      Originally posted by SwissSteve View Post
                      Travelling at the moment with limited access to Internet hence the late response

                      Thanks for the suggestions. Looks like the Tony's Straight Through boxes may give me what I want.
                      Will try this before the sports manifold as this seems less effort.

                      How much cutting to the existing exhaust is required to fit the straight through boxes?
                      Any tips I need to know?

                      Thanks to all for the responses. Really like the sound on the video above, cool
                      the video of my car, standard manifolds, stainless system through to large bore tailpipes.

                      I think mine might be too noisy with straight through silencers, I do a lot of motorways and quite like the gentle harmonic burble when cruising.
                      Stags and Range Rover Classics - I must be a loony

                      Comment

                        #12
                        Mine did sound like this:

                        https://www.youtube.com/watch?v=O21bPrYH4-Y


                        Wasn't a TV8 but a RV8 back then. I did have a large bore manifolds 1 5/8" i think. into a 2" collector an "X Pipe" then straight through to some Moto guzzi end cans. Without the end cans it was like someone with a shoot gun sitting in the back seat every time you backed off the throttle.

                        Now it sound like this;

                        https://www.youtube.com/watch?v=GMrR9cwp49c


                        Well it did 18 months ago, but as i wasn't able to drive ( medically , not banned , well revoked) i decided to take it apart again. No real reason but seemed like a good idea as i could use it. Yes my head wasnt all there.

                        Its still in bits but i can drive now and the reason its still in bits is:

                        (Warning Bike Porn)

                        zx12r ya baby grab that horizon.JPG

                        New Toy and its red and we all know red the fastest colour, its all about chemistry, physics and some old bloke called Newton. All for the price of an stag engine rebuild, well possibly less. A lot less than my Stags gearbox or Air suspension.

                        I'm obviously getting more frugal with my money and a lot wiser and sensible with age.
                        Last edited by bullstarz; 28 June 2019, 23:46.

                        Comment

                          #13
                          Bullstartz is that. 600 or 1000? I have a 20 year old Daytona 955i in the fastest colour too!

                          Comment

                            #14
                            Originally posted by stagstan View Post
                            Bullstartz is that. 600 or 1000? I have a 20 year old Daytona 955i in the fastest colour too!
                            It a ZX12r 2001, 18 years old and 1199cc. Completely standard but its getting a new exhaust as no one can here the bike so they don't know I'm there. Their too busy , on their phones, texting, putting make on, eating or daydreaming to look in there mirrors. At least then they'll hear me and get out of the way.
                            Last edited by bullstarz; 29 June 2019, 18:06.

                            Comment

                              #15
                              Originally posted by bullstarz View Post

                              It a ZX12r 2001, 18 years old and 1199cc. Completely standard but its getting a new exhaust as no one can here the bike so they don't know I'm there. Their too busy , on their phones, texting, putting make on, eating or daydreaming to look in there mirrors. At least then they'll hear me and get out of the way.
                              Nice. I have a loud pipe for that same reason

                              Comment

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