High flow cat

[pboglio]

Anybody switched from a testpipe to one of the new Random Technology Metal Substrate high flow cats? They claim 598 cfm on their 3" cat. In comparison the Magnaflow/Carsound 3" version flows around 420 cfm @ 25-28" H20. Anybody running one of these new Metallic substrate cats? Opinions welcome.

 

[pboglio]

Did a little web search. This is what the new metallic cats look like on the inside. Looks about as restrictive as a 2g MAF, not too bad.