I'm looking to change the factory subs on my SRT-6. I have seen that JL and Kicker both make a small 6.5 inch sub. I'm not an audio guru so I would like some help if possible:

1. Will they fit?

2. If so is there enough airspace to get a decent sound?

3. Any other brands or suggestions would be greatly appreciated

Here are the specs in case you were wondering....

JL 6w0 specs
Nominal Diameter: 6.5 inches (165 mm)
Mounting Depth: 3.5"
Continuous Power Handling: 75 Watts
Voice Coil: 1.25" diameter, 4-layer, Kapton former
Available Configurations: 4 ohm (Single Voice Coil)
Xmax (one-way, linear): 0.285" (7.2 mm)
Sealed Enclosure Range: 0.15-0.20 cu.ft. (4.3-5.8 liters)
Ported Enclosure Range: 0.20-0.33 cu.ft. (5.8-9.3 liters)
VRCtm Technology: YES

Kicker 08 CVT 654
Power:
150 Watts RMS
300 Watts Peak
4 Ohm Single Voice Coil
Injection molded polypropylene cone woofer
Ribbed santoprene rubber surround
Spiralead" tinsel-lead technology
Spring-loaded binding posts
Slender basket
Shallow-mount
Uniplate" backplate and pole
360° Back bracing
Perimeter venting specialized four-layer high-temp single 4 ohms voice coil
Woofer Surround Santoprene Rubber
Woofer Composition Injected Molded Poly
Frequency Response: 30 Hz - 350
Mounting Depth: 2-13/16"
Mounting Cutout: 5-9/16"
Sensitivity: 85 dB

I posted this on another thread but nobody responded so I'd thought maybe I would try here... Thank Guys!