No cat-back exhaust options for e60?
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The most recent car I actively modified was an '05 350z roadster. When it came to exhausts, most were cat-back applications. Now that I have the 550i, I'm shocked to see that most of the single exhaust options (not interested in quad setups) require that you cut the stock exhaust and use a clamp to hold the aftermarket exhaust.
Why are third parties not providing true cat-back solutions for our e60's?
Thanks,
Rob
Why are third parties not providing true cat-back solutions for our e60's?
Thanks,
Rob
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Cat backs on most modern cars are simply not necessary or worth the extra cost to the manufactueres due to offering no gains.
Moder cars, especially the e60 has a very efficient route from engine-headers-exhaust piping-muffler that there is no benefit to be had but replacing all that after-cat piping. The only true restrictive part of a modern car is the rear muffler as it is made for sound deadening. The piping leading up to the rear muffler is very straight, soft bends and a good size-so it is easier to offer replacment rear mufflers as that will offer as much performance as a cat-back in the majority of non-turbo modern cars.
Less work to install too-and offers all the same sound benefit.
Moder cars, especially the e60 has a very efficient route from engine-headers-exhaust piping-muffler that there is no benefit to be had but replacing all that after-cat piping. The only true restrictive part of a modern car is the rear muffler as it is made for sound deadening. The piping leading up to the rear muffler is very straight, soft bends and a good size-so it is easier to offer replacment rear mufflers as that will offer as much performance as a cat-back in the majority of non-turbo modern cars.
Less work to install too-and offers all the same sound benefit.
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Thanks for the response, Diamond. I wasn't thinking there were additional gains to be had through a cat-back option, I view this option as a "cleaner" approach to changing out our exhaust. No cutting and changing back to stock would be as easy as tossing the car on a lift.
It's my understanding that the bolts on the back end of the cats are easy to reach. I can only think that third parties don't want to take the time to prepare a proper two piece (necessary so it can be shipped) cat-back option either because they are lazy or don't want to spend the R&D dollars. Does anyone know the interior diameter of the cat-back exhaust prior to the muffler? Would the 550i benefit from larger diameter tubing?
I know a certain amount of back-pressure is necessary, but the third party vendors for the 350z community spent a lot of time researching these issues for optimal gains.
It's my understanding that the bolts on the back end of the cats are easy to reach. I can only think that third parties don't want to take the time to prepare a proper two piece (necessary so it can be shipped) cat-back option either because they are lazy or don't want to spend the R&D dollars. Does anyone know the interior diameter of the cat-back exhaust prior to the muffler? Would the 550i benefit from larger diameter tubing?
I know a certain amount of back-pressure is necessary, but the third party vendors for the 350z community spent a lot of time researching these issues for optimal gains.
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