Are you guys saying a cutout isn't worth it if you have a Cat-Back System? I have a Corsa Cat-Back, and I am getting FLP Long Tube Headers soon. Will a cutout not help me out any? Be a waste of money? Thanks.

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--Michael
'01 Camaro SS A4
Mods Include:
Superior 3.73 Gears, Jet Chip Racing Chip, K&N Air Filter, Free Ram Air Cut-out, Granatelli MAF, Whisper Induction Lid, Corsa Cat-back Exhaust, Jet PCM Controller--Calibrates for my gears, Auburn Carrier, Hypertech 160 Degree Thermostat, SLP Strut Tower Brace, Sub Frame Connectors, Throttle Body Bypass, Powerslot Slotted Rotors, Hawk Performance Brake Pads.

Best 1/4: 13.192 @ 106.38MPH w/2.086 60' on GoodYear Eagle F1 tires.

Recent 1/4 run on 4/10/02: 13.502 with a 2.367 60' on 275x40ZR17 Dunlop SP sports, without the 160 thermostat, STB, SFC, or TB Bypass--With Some DR's, maybe run a 12.8, or 12.7? Fingers crossed. Headers coming soon.

See "Cammie" at http://members.cardomain.com/ozorowsky

 

it prolly won't help you any. if it does it'll prolly just make it a little louder if it even does that. corsa's are good exhaust that don't need much help.

 

A cutout will gain over a catback. Might not be much. Maybe 2-7hp depends on the catback and flow. Remember it isnt going through a muffler.

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Jack
00 Camaro Z28
Whisper Lid, 3.73s, Z06 Clutch, HPP3, Spohn LCA, PHR and Quick Time Electric Cutout

 

It depends on how free flowing your Corsa exhaust is, I'm not familar with what the inside of that muffler looks like.

I know after I added FLP's to my car, the Flowmaster proved to be restriction.

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1997 Bright Red Z28
A4, 3.23's, K&N FIPK, FLP Headers, Flowmaster, Cutout
My Z28

 

A buddy of mine has a Corsa cat-back on his TA with a cutout. He actually lost a little power with the cutout open on the dyno. He just opens it when he wants to be noticed and keeps it closed when he races.

I have a stock exhaust and could feel a BIG difference with the cutout. I will find out if I can improve upon my best 1/4 mile time (13.4) as soon as it cools off.

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Jeff
98 Z28 13.4@107.3/312.3RWHP 324.9RWTQ
-direct flow air lid, K&N air filter, exhaust cutout w/ McCord power plate.
99 GTP 14.6@96
-K&N air filter, 3.25" pulley, Tranny cooler, 3" int. pipe with stock mufflers.

 

Maybe with just a cat back adding a cut out will only add 5hp, but he is also doing FLP headers with straight pipes. This will require more air flow. IMO a cut out will help out more in his case due to his headers.

and latter down the line cam and heads are planned. with those on there a cut out is required.

 

i doubt you will see much improvement by putting a cutout on with headers and a catback. very very small gains if so, except for the decibal department. i love having my car loud, but if you did that you are going to be hunted by the hogs for sure.

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1999 Camaro SS A4 Black/Black/Dark Gray w/ Torch Red Hood Scoop and Torch Red Rear Stripe... 3:23 || SLP Loudmouth || SLP AirBox Lid w/ K&N || SLP Bowtie Grille || SLP CAI || SLP SFC || SLP STB || AZP&S Adjustable Fuel Pressure Regulator w/ 3psi Boost || Sullivan Aluminum Racing Pedals || Yank ST3500 || B&M 24K Tranny Cooler || Jet-Hot Hooker LT Headers w/ ORY || Hypertech 160 T-Stat || SLP Fan Switch || 17 x 9.5 Aluminum Z06 Wheels || Nitto 555R's || Macewen White Faced Gauges w/ Red Dash Bulbs || Xenon Headlights.