Hyper-Flows vs Test-Pipes vs Cat Replacement Pipes

Post up pictures .. I'm sure someone will be able to ID it.

There are tons of threads about replacement cats and de-cat or test pipes. It would make sense to run a search to find out more ...

Cat improvement route:
Vendors: Hyperflow, Fabspeed, Gothspeed, Magnaflow cats
+ Better exhaust flow characteristics (very close to test pipes)
+ Sounds louder
+ Hyperflow and Gothspeed are the best IMO. Gothspeed cats have greater diameters to improve flow. Both are contructed very well.
+ Save a few pounds in weight
- Expensive

De-cat/Test pipes/Cat replacement pipes
Vendors: Hyperflow, X-OST, Your neighborhood exhaust shop
+ Light weight
+ Engine bay is a lot cooler (cats generate most of the heat
- Fuel smell on start-up and idle
- Pain of swapping out with cats for the emissions test. I think some guys have passed the test without cats as well somehow.

 

I removed the factory cats from my 355 a few months ago, I fitted the replacement Tubi pipes (concerto?) the difference in sound is dramatic, my car was not quiet to begin with but the change from removing the cats was much more than expected.
It took me a few drives to get used to the new sound, it sounds fantastic and really is F1 like, but very loud. I would recommend you remove the cats and see what you think, it won't cost much to have a couple of pipes made up and fitting them is easy, if you don't like it you can go back to stock or fit the gothspeed's/hyperflows.....

 

Do the test pipes trigger the CEL on the 5.2 version?



Darrell.

 

Absolutely.

 

Any thought on these cats from Ebay?


http://cgi.ebay.com/ebaymotors/Ferrari-355-Catalytic-Converter-Exhaust-94-95-96-97-98_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1240Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318QQ_trksidZp3286Q2ec0Q2em14QQhashZitem320313340489QQitemZ320313340489QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

 

Don't know anything about them, but I like the design. They appear to be well made, and I like the flange set up.



Darrell.