sequential tail lights for '06 GT

i'm going to get plug-in sequential taillights for my '06 GT and was wondering if there is a particular brand that blinks slower than others or "chases" when signalling? the reason i ask is that i was behind a shelby and when he got on the brakes and signaled, the taillights sequenced so fast that it almost looked like it had standard taillights. thanks for all reads and replies!
 
The only kit I know of that offers the chase feature is Meter4it.com. I have had one installed in my '06 GT 'vert for years and I love it. The beauty of this kit is that by changing a switch you can have Chase, reg. sequential or factory. The reg splice in kit is $155, the partial plug & play kit is $205. The guy is a great guy to deal with too. Great customer service.