To answer the questions I started Sports Cats only and they were an amazing improvement on the standard system. I opted for a little more mayhem and went for the xpipes a few months later and the noise was unreal, literally turned heads everywhere i went. Either seperate or together, they made...
Larini X Pipe and Larini Race Cats for GranTurismo S 4.7 Auto For Sale
Both purchased via SB Race Engineering - Less than 8 months old
Reach out if interested.
I had registered as I hadnt heard anything - If you do a Sport Maserati registration rather than individually they said they will move me into it. Steve.
Thanks for the advice Voicey - is it possible something happened/changed during the installation of the CATs/Air Filter or is it likely more coincidence?
Yep - definitely - I found some old links to the error codes online:
https://www.tapatalk.com/topic/79193-177666
http://www.maseratilife.com/forums/granturismo/53994-check-engine-light-please-2.html
http://www.maseratilife.com/forums/coupe-spyder-gs/16202-cel-error-code-p0492.html...
0492 P0492 - secondary air injection system insufficient output (max)
0491 P0491 - secondary air injection system insufficient output (min)
Under the status field, the engine management icon is present on the MAX code.
Thanks guys.