Pick your boost and make a 4 minute pulley change. Run 8-15 psi on the street with 92 octane and then increase the octane for higher boost levels up to 27psi. The 2.4L will support 700+ RWHP on an '03 Cobra.

The best performance product available for the '03 Cobra. Just bolting it on at same 13 psi as Eaton increases power by 72HP. That's more than headers, exhaust, pre cats, x pipe, throttle body and mass air meter make - and there's plenty more supercharger potential power on tap.

All the features of the Kenne Bell BLOWZILLA 2200 (2.2L) and the 2400 (2.4L) are the same i.e. billet case and rotor shaft supports, huge bearings and shafts, 6x4 low speed/low friction rotor, CNC machined inlet and outlet etc. The BLOWZILLA 2400 (2.4L) rotors and case are approx. 1" longer. This raises boost 3-4 psi with the same pulley size and ratio and cfm approx. 9%. The higher boost can make another 60HP over the 2200 (2.2L). The same pulley size from a 2.2L will produce up to 4 psi higher boost on a 2.4L. At the same boost level, the 2.4L uses a .5" larger OD pulley which provides a big 11% increase in belt contact area. This greatly reduces belt slippage and boost loss - and the need for expensive power robbing 10 rib pulley systems. This is an over the top kit for those who want maximum power potential from a Twin Screw supercharger. Note: There is no other advantage to using the 2.4L if your boost objective is under 24 psi (see Supercharger Efficiency Explained).

Note: The 2.4L supercharger is NOT interchangeable on a 2.2L kit. The 2.4 is 1" longer and the kit uses a different drive and pulley, lower manifold, inlet manifold, brackets, coolant tube and intercooler water outlet. Therefore, there is no way a 2.2L kit can be upgraded to a 2.4L kit.

A direct bolt on replacement. 30% lower air charge temp and 30% less parasitic (HP) loss than the stock Eaton. 70 more HP than Eaton at 13 psi (90 more HP with Kenne Bell Cobra "Cool Air Kit") - and the boost doesn't "drop off" from 13 to 10.5 psi as with the Eaton. Boost range 9-30 psi.

"Should I order the 2.2L or 2.4L kit?" We'd recommend first reading the "Autorotor vs. Lysholm Comparison" http://www.kennebell.net/techinfo/ford-techinfo/AUTOROTORvsLYSHOLM.pdf particularly the section on "Supercharger Ratings and Output." It explains just why you should never base a decision on "size" ratings alone whether it be superchargers, cams, injectors, headers etc.

Let us forget the dyno numbers game - the opinions and theories of others - and the "forum rhetoric" for a moment and think about just how "big" a supercharger you really need. Take our '03 Cobra kit with the BLOWZILLA 2200 (2.2L). It can produce 900 engine HP. Yes, the potential of the 2.2L is already excessive for the average pump gas street Cobra. 15 psi is about max for 94 octane. Evan Smith, Tech Editor of Muscle Mustangs and Fast Fords drove Richard Juliano's Kenne Bell Supercharged 665HP Cobra with 18 psi and 94 octane pump gas to a 10.71/133 on street drag radials and stock suspension. These cars feel like built 700" big blocks. Granted, he had another 6 psi and 72HP left, but a higher 24 psi boost level demands higher octane (approx. 1 octane per .66 psi boost), a beefed clutch, upgraded transmission, straight axle rear end etc. 665HP is an incredible increase of 300HP over stock. At some point, you must decide just how much power is enough. When we developed the BLOWZILLA 2200 (2.2L) kit, we felt it would satisfy 99% of our street/strip customers. Run 15-18 psi on the street and 19-24 psi at the weekend drags with race gas (octane depends on boost).

Again, plan on replacing the trans input shaft, clutch and lRS if you continue launching the car with this much HP and torque. However, if you want the biggest, baddest, most efficient and reliable Twin Screw supercharger kit, then the Kenne Bell 2400 (2.4L) is your only choice. Expect up to 4 psi over the 2200. That's 28 psi and at least 60 more HP. At this point, you'll also need 71lb injectors, dual fuel lines, etc. However, if you "just gotta have one" even if the desired boost is 13-24 psi, (the ideal efficiency range for the 2200 2.2L), it won't hurt a thing.

Dyno tests with a 2.2L and 3" pulley vs. a 2.4L and 3-1/2" pulley, both at 24 psi, indicated no advantage in power for the 2.4L. The 2.4L does utilize a ½" larger pulley which yields around 15% more belt surface area and reduced slippage potential, the charge temp will also be cooler.

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