Keep lookin..
The Firm Feel box may feel good but their customer service is zippo..
I bought one and it leaked, called them and talked to an arrogant person who said send it back @ my expense and they would check it out and get back to me..
Gee thanx..

While I had the car torn apart, bought another box from another supplier installed it all was well no leaks..
Bought a reseal kit and rebuilt the FF box, and sold it @ the Fling..

Many people like the Firm Feel stuff, but in my experience their product quality was marginal and customer service was horrible..

Just my $0.02..