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2011 CTSV coupe 2010 cts4 wagon
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129 Posts
Discussion Starter #1 (Edited)
IMG_20130318_160118.jpg IMG_20130319_233029.jpg IMG_20130319_201258.jpg
Inside the muffler a y pipe was installed with a QTP valve. Love this mod because you adjust the sound to stock to wild.
my perference is 1/8 to 1/4 open via remote transmitter. the video only show full open to close. You can clearly see the better flow open vs closed by the steam out the tail pipes

video
http://youtu.be/BUfp-3xsOTI

Enjoy by the way i never did much welding before, but better after this mod
 

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2011 CTSV coupe 2010 cts4 wagon
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129 Posts
Discussion Starter #3
ported blower&heads/cam/headers/90mtrottle/meth alky/new era intake/2.55 and 9.1 pulley/now working on a tune
 

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Had 2009 V, Red/Blk 2016 Now
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4,186 Posts
Did you keep the second set of converters up front?
 

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2011 CTSV coupe 2010 cts4 wagon
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129 Posts
Discussion Starter #5
Did you keep the second set of converters up front?
i went with american racing headers it comes with cats and pipes to hook-up to stock muffler for a sedan or coupe. I prefer them over others best built header in my opinion
 

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2011 CTSV coupe 2010 cts4 wagon
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129 Posts
Discussion Starter #7
Dyno yes! but will street tune it first without getting on the hammer, but the problem is snow. Hard to believe we got snow given the prior years. last year same time people were in bikini's and short
 
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