Top Speed's Cat Back System Installation

[heymanwatchthis]

Guys,

I could use some advice from those of you with the test pipes and TS exhaust. I installed the exhaust but felt there was too much drone, however I still had all 4 cats in my '01 S. I put the stock exhaust back on, but have since installed the 2nd cat delete (which is great).

I live in the mountains, which can really make drone in an exhaust stand out as hills in higher gears can put the car in the 'drone sweet spot'.

Question - does running the TS exhaust with the test pipes in place reduce drone? This is compared to TS exhaust with all 4 cats in place.

Thanks!

Gary