An IB 12 or a sealed 8?

[BlackMaxima 10+ year member]

To get the same output of the 12 in IB any 8 you will run will need about 10x the power to get a similar low end. IB configs can be the most efficient set up you can run. I had a pair of FI X series in IB and the output was unmatched and I was only running 300w to the pair at 4 ohms. Baffle needs to be SUPER solid and seal it up the best that you can and you will be one happy camper! IB will not be the loudest option but the SQ is the win!

thats true, it important to have it solid,

 

[BlackMaxima 10+ year member]

it that black thing behind the amp the gas tank??

 

[RunninRedline 10+ year member]

it that black thing behind the amp the gas tank??

Yes it is... came that way from the factory. When I bought the car, the salesman told me that was the factory sub-woofer box. You had no idea how happy I was when I went to rip it out only to find out it was my gas tank.