Hopefully it will be Ricers who will only smell my fumes for a short time until I leave them in my dust.

You wanna smell baaaad. Just try some of the 104 Octane Plus booster in the Black bottle. Whew! Nasty smelling for all on the outside.

In all honesty, you won't get 10 HP from that, and removing the CAT is not right IMHO. A car without a cat pollutes atleast 10x as much as one that doesn't. There'* a reason there is a 10,000 USD fine for not having one. Put on some nice high flow mufflers and cats instead.

Don't get me wrong. I care about the environment too. Since I drive about 10x less than anyone else, I don't think I contribute any more than the rest.
10 hp is not unrealistic. Most hi-flow CATs advertise an 8 hp improvement, so taking it off.....
When I took them off my other cars....whoa...a noticeable difference, so I'm a believer.
It sounds much better and when I took it off my Firebird, the idle speed went up two hundred rpm....had to re-tune it. and it took off two tenths.

I hope that $10,000 fine is for permanent residents of the US cause I am Catless when I go down there......Will????

You got me on that one. Not sure about cars entering the US. But I'm betting Canada has a similar law about modifiying or removing an emissions device.

I know the fines here have alot of exhaust shops scared, and I've heard of people getting busted.

My own exhaust guy showed me exhaust flow charts with a stock CAT, hi flow Cat, and no cat. There was neglible difference between none and high-flow. I took the safe route, but probably would have anyway, just for environmental reasons.

aircare.ca

A note from the site,
This only applies to residents of the Fraser Valley and Vancouver. We're too rural buddy.

Now I understand all of your enviromental worries about removing a cat, and they make sense, but if you have your car tuned properly you can make it put out less pollutants without a cat, then some cars with cats. I have heard on numerous occasions of GTP owners passing emissions without a cat! As for not getting 10hp, I beg to differ on that too. Before we removed the brand new cat off of our '90 Turbo Grand Prix Coupe if you stopped dead on a road and nailed the gas you MIGHT have chirped the tires if you were lucky, and we went to the track and it ran a best of 15.042 @ 91.90 mph, with the best run other than that being a 15.18, and the rest of the runs averaging ~15.35. We then removed the cat, which I might add was only 2 weeks old at the time, you could go out and stop dead on a road and nail the gas and the car would sit there and smoke the tires. Then we took it to the track a week and a day after we took it for the 15.042 run and made only 2 runs. The first run was a 14.819 @ 92.72 and it backed that up with a 14.842 @ 92.62. Now, I have never wanted to take a cat off of a car before then because I didn't think it did much good, but this has me convinced! With the only thing being changed being the cat, and the car gaining over 2 tenths over its previous best time, and averaging over a half second quicker, you would have to have a VERY high flowing & cheap cat to convince me to switch back. The GTP still has a cat on it, a high flow cat, but a cat nonetheless. We are going to get a flange put in the exhaust before the cat so we can pull the exhaust off, and just run open headers at the track. I assume we will get similar gains.

Shawn

I think the gains with the 3800 are a little different. The Bonneville has a pretty low-restrictive exhaust to begin with. Sounds like your TGP didn't.

hmmm. We'll soon see about that.

So, you think that removing a simple U-bend will gain you 5hp and 5ft-lbs but that removing an inline pressure dropping scrubbing device won't be significant.

With your cars setup you may get 10 HP, but that'* only because it'* breathing a little better then before. I have decided not to do the EGR, because my engine is just over 100,000 miles, and i'm not wanting to stress the intake and run it hotter then I have to.

Exhaust Gas Recirculation (EGR) System Description
Purpose
The exhaust gas recirculation (EGR) system is used to lower oxide of nitrogen (NOx) emission levels caused by high combustion temperature. The EGR does this by decreasing the combustion temperatures.

The main element of the system is the linear EGR valve. The EGR valve feeds small amounts of exhaust gas back into the combustion chamber. With the fuel/air mixture diluted by the exhaust gases, combustion temperatures are reduced.

Operation
Parts of an EGR Valve:
Cap-Sensor
Sensor-EGR Pintle Position
Pole Piece-Primary
Bobbin and Coil Assembly
Sleeve-Armature
Valve-Pintle
Armature and Base Assembly

The linear EGR valve is designed to accurately supply EGR to an engine independent of the intake manifold vacuum. The valve controls EGR flow from the exhaust to the intake manifold through an orifice with a PCM controlled pintle. During operation, the PCM controls pintle position by monitoring the pintle position feedback signal. The feedback signal can be monitored with a scan tool as EGR position sensor. The EGR position sensor should always be near the commanded Desired EGR Position. The PCM uses information from the following sensors in order to control the pintle position:

The engine coolant temperature (ECT) sensor
The throttle position (TP) sensor
The mass air flow (MAF) sensor
The linear EGR valve is usually activated under the following conditions:

Warm engine operation
Above idle speed
Diagnosis
Too much EGR flow at idle, cruise, or cold operation may cause any of the following conditions to occur:

The engine stalls after cold start
The engine stalls during closed throttle conditions
The vehicle surges during cruise
A rough idle
A DTC P0300--misfire detected
Too little or no EGR flow may allow combustion temperatures to get too high. This could cause the following symptoms:

Spark knock
Engine overheating
Emission test failure
DTC P0401
Reduced fuel economy
EGR flow diagnosis is included in the DTC P0401 diagnostic table. Pintle position error and control circuit diagnosis is covered in DTCs P0403, P0404, P0405 and P1404. If EGR diagnostic trouble codes are encountered, refer to Diagnostic Trouble Code (DTC) List for diagnosis.