Precat removal - How I did it...

Started by GSB, April 14, 2004, 09:10

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mdw

#500
Im sure the Zero exhaust guy is correct but I couldnt tell much of a difference between before and after in performance.    Mind you apart from the noise I dont notice any performance difference between our  fl cats knocked out with tte exhaust and the fl with cats and stock silencer.   Maybe Im just not in tune enough to it.
The one I knocked the cats out of they were in perfect condition top and bottom at 68k miles.
Sable 53
Spectra Blue 03

shnazzle

Quote from: mdw on July  7, 2019, 19:28Im sure the Zero exhaust guy is correct but I couldnt tell much of a difference between before and after in performance.    Mind you apart from the noise I dont notice any performance difference between our  fl cats knocked out with tte exhaust and the fl with cats and stock silencer.  Maybe Im just not in tune enough to it.
The one I knocked the cats out of they were in perfect condition top and bottom at 68k miles.
At the power levels the mr2 is running it'll damn near unnoticeable. 

You'd probably notice a bigger difference in performance if you took the passenger seat out
...neutiquam erro.

Gregmorse

Probably been said a hundred times but you should really use high pressure air line to blow away all last bit of debris in the nooks and crannies.

A7DUO

great thread,  and I removed mine last week on a freshly acquired 2001 MR2. I was contemplating knocking the inners out, but I found a used stainless manifold for £50quid on Facebook Marketplace, one that just needed a new set of studs fitting and some new gaskets and job done (it even fitted with the OEM head guard).  I drove it today and its fine - maybe a bit more oomph in the mid-range too (or could be my imagination, as it ran fine before too).  The main thing is peace of mind the pre-cats won't disintegrate and damage the block now, and a nice little weight saving to boot too as the OEM one below weights quite a lot as you all probably realise now too  :)
Matt (2001 Toyota MR-2) 2009 Toyota IQ, 2016 Caterham 420R, 2008 Mini Clubman CooperD

Call the midlife!

If you've still got the original you can cash it in for the precious metals in it.
60% of the time it works everytime...