Is a de-restricted 12A pipe same as 10W?

[Nismosis]

Hello chaps,

My Mk1 RD has a derestricted 12A standard exhaust fitted. The restricting ring/tube has been removed from the flange end of the exhaust (where exhaust bolts to the exhaust port) but I was just wondering if this is now exactly the same as a standard 10W exhaust?

Is there any more restriction further down the exhaust i.e. in the expansion chamber? Is the only difference between a standard 12A and 10W exhaust pipe the restricting ring/tube in the flange end of the exhaust?

I was looking to get a standard 10W exhaust but if mine is basically the same (now the restrictor ring/tube has been removed) then I’ll just stick with mine and get it blasted and then properly painted.

Cheers

Gary

[mellow]

id say its fine now

[billy]

Check the hole at the very end of the pipe. What inner diameter does it have? I know there is one pipe model that has a smaller ID than the 10w pipe.
Going from memory, the restricted pipe has "Y11" or something like that in the serial number/letters.

Edit: I don't know if UK got these pipes though. I've never seen them mentioned.