options on gutting cats - ZR-1 Net Registry Forums

jamieszr1 · 01-20-2004

1991 ZR1 was wondering if there is any addvantage buy gutting the cats ,like louder exhaust, and will it set off any codes, or is it a waste of time thanks jamie

Locobob · 01-23-2004

Louder = yes, a bit
More power = yes, probably worth 10hp or so
Codes set = no
It's a major PITA to remove the manifolds and an even bigger PITA to put them back on. If I were you I'd just spend the extra dough and get a set of headers, you can sell the stock parts to recoop some of the cost.

Tom · 01-23-2004

Take a look at the following article: http://www.zr1specialist.com/HAT%20W...kpressurea.jpg

Changing the mufflers will give much more power gain than gutting the cats. Gutting the cats would be a large effort for very little gain.

01-20-2004	#1
jamieszr1 Join Date: Jan 2004 Location: mankato mn Posts: 3	options on gutting cats 1991 ZR1 was wondering if there is any addvantage buy gutting the cats ,like louder exhaust, and will it set off any codes, or is it a waste of time thanks jamie __________________ 1991 ZR1

01-23-2004	#2
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,057	Louder = yes, a bit More power = yes, probably worth 10hp or so Codes set = no It's a major PITA to remove the manifolds and an even bigger PITA to put them back on. If I were you I'd just spend the extra dough and get a set of headers, you can sell the stock parts to recoop some of the cost. __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

01-23-2004	#3
Tom Join Date: Jan 2004 Location: Southern CA Posts: 108	Exhaust system pressure drop Take a look at the following article: http://www.zr1specialist.com/HAT%20W...kpressurea.jpg Changing the mufflers will give much more power gain than gutting the cats. Gutting the cats would be a large effort for very little gain.