BIG Day today: New Cats arrive and first Dyno!
#41
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I think you answered your own question ![Wink](https://www.jaguarforums.com/forum/images/smilies/wink.gif)
If you don't want drone you definately need to leave or replace the resonator boxes at the back, if I was you I would replace the cats, leave the centre box, get some over axel pipes removing the 2 boxes in front of the axel and squashed pipe and keep the rear boxes with some nice tips.
If you have an 8 you will need to replace the rear boxes either to R boxes or aftermarket, otherwise you wont get a decent tip on the end.
![Wink](https://www.jaguarforums.com/forum/images/smilies/wink.gif)
If you don't want drone you definately need to leave or replace the resonator boxes at the back, if I was you I would replace the cats, leave the centre box, get some over axel pipes removing the 2 boxes in front of the axel and squashed pipe and keep the rear boxes with some nice tips.
If you have an 8 you will need to replace the rear boxes either to R boxes or aftermarket, otherwise you wont get a decent tip on the end.
#42
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#48
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331 vs 323 peak HP, 325 vs. 316 peak ft-lbs on the first comparison (rounded, at the wheels)
331 vs 320 peak HP, 319 vs 313 peak ft-lbs torque on the second comparison (rounded, at the wheels)
Certainly not dramatic, but there are small gains, in the neighborhood of Nameless' claims....and they sound great.
#49
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These differences seem similar to what you would get from performing a number of baseline runs--basically within a margin-of-error. Nevertheless, I will probably end up getting these for the improved sound (although I hope it is not too objectionable) plus the slight performance gain.
Doug
Doug
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