I comprised this awhile ago and thought since we have one for the 997 Turbo, ah why not? Feel free to add more or better clips.

Euroipe-Stainless Steel Sport Exhausts for Porsche 996 S / 997 Turbo 996 GT3 / GT3 RS / 996 Turbo / GT2

GMG WC-Video of GMG WC Exhaust - Photobucket - Video and Image Hosting

UMW Fly-by - Video of UMW Exhaust - Photobucket - Video and Image Hosting

AWE-http://www.awe-tuning.com/pages/shar...L=996ttexhaust

Cargraphic Loud
YouTube - GT2 Blasts off into the Night

Straight pipes
YouTube - Sound test - Porsche 911 turbo with straight pipes

Tubi
YouTube - Tubi exhaust on Porsche 996 Turbo

FVD
YouTube - FVD 996 TT Exhaust (Race Muffler)

Agency Power
YouTube - Agency Power 996TT Exhaust

Ruf
YouTube - RUF R-GT2 Rev!!

Miltek
YouTube - Milltek Porsche 996TT Exhaust Clip

Miltek
YouTube - MillTek exhaust sound clip Porsche 996 Turbo

Fabspeed Gen III
YouTube - Porsche 996TT with Fabspeed Maxflo Exhaust/Sport Cats

Ultimate Motorwerks dry rev
YouTube - Ultimate Motorwerks Race exhaust for Porsche 996TT

JIC Cross Ti
YouTube - CROSS 996 Twin Turbo Titanium Exhaust

GMG WC-GT
YouTube - GMG WC GT EXHUAST FOR 996TT-GT2

Switzer Cold Start
YouTube - cold start switzer

Switzer Dry Rev
YouTube - S W I T Z E R exhaust

Exhaust Cutout
YouTube - Holy Exhaust Batman (holes in stock muffler)

DesignTek
YouTube - Porsche 996 Turbo awsome sounding Exhaust

RB Tech
YouTube - RB Tech Porsche Turbo exhaust system

Race Precision
YouTube - Porsche 911 turbo with Race Precision 3" Exhaust Part 2

Kreissieg
YouTube - Porshe 996 turbo Tiptro kreissieg②passing F1 V・T　Exhausｔ

Maxspeed
YouTube - Maxspeed-Motorsports Porsche 996 Turbo Exhaust System

B&B Lemans
YouTube - B&B Leman exhaust Porsche 996 turbo

Speedtech
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Wow thanks for putting that together. That is awesome!!