GS - 3rd Gen (2006-2011) Discussion about the 2006+ model GS300, GS350, GS430, GS450H and GS460
Old 12-15-14, 03:32 PM
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06 gs430 performance mods?

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Old 08-05-13, 08:00 AM
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designo
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I got the pipes off a member here who had his car tested by Invidia when they made these. He literally sold them to me at giveaway price.

Regarding installation, I don't know about your part of the world, but labor here is dead cheap. Got them installed for less than 30 bucks!
Old 08-19-13, 07:37 PM
  #17  
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Default invidia mid

Originally Posted by designo
I got the pipes off a member here who had his car tested by Invidia when they made these. He literally sold them to me at giveaway price.

Regarding installation, I don't know about your part of the world, but labor here is dead cheap. Got them installed for less than 30 bucks!
I have the invidia mid on my gs430 and made no changes to install it. I even have it bolted to my factory catback. It gives a subtle european sound. It kind reminds me of a austin martin.
Old 08-28-13, 08:11 AM
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Originally Posted by designo
You will not get any relevant performance gain unless you can crack the V8 GS ECU. Which cannot be manipulated.

The best you can do is add a performance panel filter like K&N or Tom's.
And replace your catted mid pipes with an Invidia resonated mid pipes.
Your axle back exhaust can be replaced with something lighter perhaps.

And if you're lucky you can de-cat your primary exhaust manifolds and have O2 simulators installed to cancel out any potential CEL.

Anything else and you're asking for trouble. Unless you can find a way to crack that ECU and keep your parameters stable, you will not be able to play around with timing, and boost should you decide to force induce your engine!

Here's what an invidia mid pipe looks like on a V8. The flanges that connect to the headers need to cut off and rotated to fit the angle of the stock flanges. Also, the O2 sensor bungs need to be relocated. Nothing a good exhaust shop can't handle in a couple of hours!







Stock Midpips



I used an Apexi Neo A/F controller with a custome made harness I purchased from Passnu.. it didn't work. I was able to run a TRD supercharger on my GS460 but things didn't work out too well as I was not able to control A/F and that almost blew my motor!

Here's a video of what potential a GS460 could have if it was possible to keep it reliably stable!

GS460 Playing with M5 - YouTube


Ok I'm hope I'm reading this right!! I actually need a stock Cat Converter. The dealer wants $2000 so if I go with a full exhaust like that you have. DO I STILL NEED THE STOCK CAT CONVERTER? I'm not into exhaust systems and this is my first system so I hope this isn't a stupid question. Thanks for the help. Great ride as well!
Old 08-28-13, 09:58 PM
  #19  
XxGoKoUxX
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If you don't want to look for any "special" exhaust systems.

Purchase a universal hi-flow catalytic converter (I'd recommend looking at magnaflow) and have an exhaust shop replace it. It shouldn't be too hard
Old 08-29-13, 11:32 AM
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Originally Posted by mrwilliams
Ok I'm hope I'm reading this right!! I actually need a stock Cat Converter. The dealer wants $2000 so if I go with a full exhaust like that you have. DO I STILL NEED THE STOCK CAT CONVERTER? I'm not into exhaust systems and this is my first system so I hope this isn't a stupid question. Thanks for the help. Great ride as well!
I cannot speak for any other GS type other than a GS460.

On my car, I had two cats where the midpipes are, and two more cats where the "headers" are (immediately where the midpipe bolts onto the manifolds)!
Old 10-19-13, 04:33 AM
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Hey guys, I thought I should update the info regarding the invidia mid pipe and the 3GS 430 -

They DO bolt directly to the car without modification, I have had them on for over a month now and will take pics soon as I am going to install my hi-flow cats soon.
Old 10-19-13, 07:41 AM
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^ any improvement on pickup? any decrease on mpg?
Old 10-19-13, 09:09 AM
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Originally Posted by angus
Hey guys, I thought I should update the info regarding the invidia mid pipe and the 3GS 430 -

They DO bolt directly to the car without modification, I have had them on for over a month now and will take pics soon as I am going to install my hi-flow cats soon.
Greats info ! Pls post pix soon 👍
Old 10-20-13, 10:52 PM
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Originally Posted by worker
^ any improvement on pickup? any decrease on mpg?
I think I lost torque but gained top end (pretty normal)

Pretty sure I gained MPG.
Old 11-03-13, 01:13 AM
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Originally Posted by worker
^ any improvement on pickup? any decrease on mpg?
Okay, after using this AND the 100 cell cats - I DEFINITELY gains MPG - I would usually average around 15-16MPG and as low as 11-12.

Now I have gotten it as high as 18.9 combined.
Old 11-03-13, 05:19 PM
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^ top end as in it can go higher speed but pickup from stop is not as fast?

good to know your mpg is improved.
Old 11-04-13, 09:00 PM
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when he says top end, I think he lost TQ in the lower end, but gained more in the top end of the RPM range.

Meaning it's a gradual graph going up as he goes higher in the RPM range vs having a steady TQ range throughout.
Old 11-05-13, 07:29 AM
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Dyno and see.
Old 11-11-13, 04:58 PM
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Originally Posted by designo
Dyno and see.
I really wanted to dyno it stock and then with mid pipe, then with cats, I just couldn't schedule it and even ended up at the shop till 4am one night just to do my cats.

I am now spending late nights to do my turbo project in my truck - not enough hours in the day!

I was thinking to dyno our bone stock '06 gs430 against my modded one...
Old 11-11-13, 08:37 PM
  #30  
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Originally Posted by mrwilliams
Ok I'm hope I'm reading this right!! I actually need a stock Cat Converter. The dealer wants $2000 so if I go with a full exhaust like that you have. DO I STILL NEED THE STOCK CAT CONVERTER? I'm not into exhaust systems and this is my first system so I hope this isn't a stupid question. Thanks for the help. Great ride as well!
For $2000 you can buy two magnaflow hi flow cats, pay for the install AND GO TO MEXICO FOR A WEEK all inclusive.
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