cat question

boogum7 · 12-14-2006, 06:44 AM

will i lose horsepower if i run a cat vs running straight pipes?

no need for emissions in idaho by the way.

just wondering which will give me best performance.

sd88supra · 12-14-2006, 08:24 AM

the exhaust will always be more free flowing without a cat but it helps if you have the right size pipe diameter.

Supra2NR · 12-14-2006, 02:56 PM

no matter what you do
cat = less horsepower

youre lucky u dont have emissions in ur state

supraman121 · 12-14-2006, 09:50 PM

Im thinking of removing both the upper and lower cat but we have emmissions in North Carolina but its only on 96 cars and up so i dont no if they look at the exhaust at all.

Staceman · 12-15-2006, 02:17 PM

If you do remove your cats, keep 'em, and anything else that geta switched out. Just in case you move, or the years change for that item like they did in Arizona. You can always bolt 'em up for inspection/emmissions, then swap out once you pass.

12-14-2006, 06:44 AM	#1
boogum7 3" Exhaust Join Date: Dec 2005 Location: Pocatello, Idaho 83201 Posts: 103	cat question will i lose horsepower if i run a cat vs running straight pipes? no need for emissions in idaho by the way. just wondering which will give me best performance. __________________ stock

12-14-2006, 02:56 PM	#3
Supra2NR 1000whp postwhore Join Date: Apr 2006 Location: Chi-Town Posts: 1,643	no matter what you do cat = less horsepower youre lucky u dont have emissions in ur state __________________ http://www.myspace.com/supra_2nr Into Bikes now,, apparently the supra couldnt kill me, so my zx6 might lol

12-14-2006, 09:50 PM	#4
supraman121 12psi boost Join Date: Aug 2006 Location: North Carolina Posts: 361	Im thinking of removing both the upper and lower cat but we have emmissions in North Carolina but its only on 96 cars and up so i dont no if they look at the exhaust at all. __________________ Upgrades- 225/50/R16's Kumho ECSTA AST (KU25) 273 bucks with shipping Magnaflow exhaust NO KAT K&N Air Filter www.myspace.com/coreyjstevens http://vids.myspace.com/index.cfm?fu...oid=1536317037 <------ this one should work check out the accident one aswell ya i might be a "fat kid" but i sure can move fast!~

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12-14-2006, 08:24 AM	#2
sd88supra 3" Exhaust Join Date: Oct 2005 Location: San Diego, Ca Posts: 190	the exhaust will always be more free flowing without a cat but it helps if you have the right size pipe diameter.

12-15-2006, 02:17 PM	#5
Staceman Intake Join Date: Nov 2006 Location: Phoenix, Az. Posts: 48	If you do remove your cats, keep 'em, and anything else that geta switched out. Just in case you move, or the years change for that item like they did in Arizona. You can always bolt 'em up for inspection/emmissions, then swap out once you pass.