Bavsound Ghost Underseat Subwoofers for BMW, V2, 4 Ohm, Pair [REQUIRES HEAT GUN & DRILL] 911 Stage 1 91 octane: up

Stage 1 91 octane: up to 40% HP / 43% TQ

This kit includes everything needed to add multi-port injection and high performance low pressure system

and other features

Simply pick up this kit and pair it with your favorite injector controller

Once combined with your existing kit

Bavsound Ghost Underseat Subwoofers for BMW, V2, 4 Ohm, Pair [REQUIRES HEAT GUN & DRILL] 911 Stage 1 91 octane: up[NOTE: REQUIRES HEAT GUN & DRILL FOR INSTALLATION SEE VIDEO GUIDE] GET DOUBLE THE BASS IN YOUR BMW OR MINI IN ABOUT AN HOUR Simply swap your factory underseat woofers with our plug & play upgrade kit and, get incredibly powerful, tight bass. TIGHTER, PUNCHIER BASS More bass without clarity is just noise. Our woofers are not only louder, they're cleaner and clearer. DO IT YOURSELF INSTALL Do it yourself installation in about an hour, even for a novice.