Finally getting round to fitting my decat pipe!

Couple of questions first though, sorry if they are a bit daft!

1 Do i need to replace the domed gasket at the forward end, between cat and exhaust, for use with my decat?

2 Do i need to utilise and if so do i need to replace the rear circular gasket between cat and exhaust for use with my decat? Bit confused as a metalic gasket has been supplied at this end that forms the profile of the joint. Do i just use this? Also do i need any sort of compound to seal any of the joins or are the gaskets suficient?

3 Should the forward bolts through the springs be replaced and is the torque setting 22 Nm / 16 lbf ft ?

4 Is the O2 sensor torque setting 44 Nm / 33 lbf ft ?

Any help much appreciated

 

Sorry bout 2 posts, first one appeared not to have been sucessful! Can someone kill one of them off ?!?!?!

 

I ran my T1R test pipe and exhaust quite happily without buying any replacement gaskets. I recall that the gasket which came with my exhaust and testpipe was metallic and perhaps a better shape?

 

1. Don't really need to change it, I never have.

2. Just use the metal gasket that came with it, Mines gasket free.

3. If the old spring/bolts look ok use them. I don't torque them, just get them as tight as I can laying on my back.

4. As above using the torque method. Plus how do you get a socket over the wires?

5. Stop messing about and get it on.