...is illegal on street vehicles, etc. I know this- please save your legal advice.
The question is: will my '93 Chevy Suburban (5.7L) benefit from this little procedure or not?
I have heard that hollowing it out causes pressure to build-up in the empty chamber, and can cause problems at higher rpm's. I am dying here on mileage, even with a tune-up, and I will be getting a cat-back exhaust system later, but I need to reduce the restrictions on my exhaust system.
Will it help my power and mileage, and if so, does anyone know how the hollowing can be accomplished?
FYI: the vehicle is not subject to emissions testing and inspections, but that's another story. Removing the entire cat is not an option because of other reasons.
Anyone have any opinions or advice on this procedure?