That SCC article is refering to the main inline cat. Which has been stated numerous times on this site that it is a bad idea to gut the main cat. (for once this rag got something right! eek )

We are talking pre-cats here. Completely different.

Gutting the clamshell style precat manifolds has garnered proven gains.

2000 SVT #674 - Check it out!

Whoever coined the phrase; "If it ain't broke; don't fix it" ~ Just doesn't get it...