Quote:
Originally Posted by caverman
The Magnaflow 3" cat-back has a 2.5" inlet. This will allow you to install it on the factory midpipe.
So...No...technically it's not a "true" 3" system. The only way to get that is to buy a complete 3" system from header to exhaust tip.
For the most part, any 3" cat-back that is sold as just the cat-back and not the complete system will have a 2.5" inlet in order to hook up to the factory midpipes.
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Although if you do have say an ARH 3 inch or kooks ect.. the magnaflow connection pipes are full 3 inch and you cut the arh mid before it necks down to 2.5, makes for 3 inch all the way out the back baby! 
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2010 SS L99, 536rwhp 10.843@126.72. Whipple Supercharger stock pulley, ARH 1 7/8 longtubes w/ catted xpipe, magnaflow 3" mufflers, ADM Race CAI, 3:70 gears, lightweight wheels and nitto drag radials. Stock internal L99, stock converter.
Bolt on best before blower 12.22@113.29 w/ nothing but ARH headers, catted x-pipe, ADM CAI and a tune on stock Pzero`s!
Other car 2008 C6 Ls3, z51, A6, Npp Exhaust, best bonestock pass 11.80@118.82, Number 2 on the Corvette Forums Bonestock fastest list..
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