What Nismo Exhaust Is This?

[Charles89]

I've just found a couple of certificates and instruction manuals of Nismo exhaust parts.

Here's the part numbers:

20100-RNR40

20100-RNR41

20020-RNR40

or

ヴェルディナ　

セミステンレスマフラー

and

ヴェルディナ　フロントパイプ

Can anyone tell me what they are? and if they are any good? xD

Sorry to be a newb

[Moodles2]

20100-RNR40 is the Nismo stainless muffler that suit 2dr ER34 while RNR41 suits the 4dr ER34 (2d and 4d are different lengths)

20020-RNR40 is the nismo stainless frontpipe to suit the ER34

[Charles89]

20100-RNR40 is the Nismo stainless muffler that suit 2dr ER34 while RNR41 suits the 4dr ER34 (2d and 4d are different lengths)

20020-RNR40 is the nismo stainless frontpipe to suit the ER34

Cheers!

So does 20100 RNR40 include cat back?