backbox

1. saxxxo1 L-plater Joined: Apr 2008 Brighton Posts: 73 Blue Mk1 VTR

   #1 8th December 2010, 08:56

   Hi all. My Powerflow backbox was recently swapped back to the original one for the purposes of the MOT.
   Im wondering if the Powerflow one is safe to put back on as it was noisy before. It failed emissions and was found to be the Cat. Do aftermarket backboxes slowly damage the Cat over time?
2. Craigvts25 Infrequent Poster Joined: May 2010 Halifax Posts: 107 Silver Mk2 Vts.

   #2 8th December 2010, 09:18

   Quote:

   Originally Posted by saxxxo1 Hi all. My Powerflow backbox was recently swapped back to the original one for the purposes of the MOT. Im wondering if the Powerflow one is safe to put back on as it was noisy before. It failed emissions and was found to be the Cat. Do aftermarket backboxes slowly damage the Cat over time?

   No, they should'nt do. I dont even take mine off for the MOT?
   
   I've got a Janspeed half system (cat-back) and i've never had to take that off for an MOT. Had it for 3 years and it been fine.
   
   Maybe your cat was just knacked anyway mate.
3. madmike231 Infrequent Poster Joined: Nov 2010 Leatherheard Posts: 176 Citreon Saxo VTS

   #3 8th December 2010, 13:20

   backboxes Hardly alter your emmissions, its the cat that takes the first blow of exhaust gases anyways and thats the main part of your exhaust system that you want to look after if you want to pass emissions tests.