"The entry level 8 psi kit made a staggering 177HP over stock. Kenne Bell is using a huge inlet breathing outside the engine compartment [cold air] while others suck through smaller tubes inside the [hot] engine compartment."
5.0 mustang magazine

GT or Boss, Kenne Bell Mammoth Kits simply make more HP without the undesirable low and midrange centrifugal boost (HP and Torque) lag.

                                                                          302 HP POTENTIAL
The Mammoth 2.8 and 3.6 kits offer huge HP gains at any and all boost levels for 302 GT Boss owners. Preliminary testing indicates a KB Mammoth 3.6LC Supercharged 302 GT/Boss 302 motor with cams, headers, x pipe, higher boost and revved to 8000 rpm (note how HP is still climbing at 7500) hits 1000 + HP – without the NOS “crutch.” 1000 + HP tests will be published at later date. Note: 302 GT HP output would be very close to Boss 302 as Boss heads would be the only HP difference.

Cool air kit included.
Huge heat exchanger.

Higher capacity injectors.
Fits under stock hood (see Tech Info).

Highest HP potential (up to 1400HP).
Largest displacement (2.8L, 3.6L, 4.2L).
Hard black anodized or polished bulletproof billet.
Tuner Kits, Off Road Kits and Street Rod Kits also available.
Up to 100HP lower parasitic losses = more engine HP at same boost.
Most powerful, efficient and technically advanced kits.
Mammoth™ 4.5”x4’ long “Ram Air Pipe” to maximize air flow and ram effect.
Patented Liquid Cooling. Cooler air charge. Up to 220° cooler oil temps.
4.5” MAF meter built into Ram Air Pipe. No more restrictive, small factory MAFs.
Patented Seal Pressure Equalizer reduces seal friction, wear and HP drag.
Billet 2.8L, 3.6L, 4.2L Twin Screw vs. others 2.3L Roots style rotors and cast case.
More low and mid range boost/HP than centrifugals with unsurpassed high RPM HP.
Chassis dyno tested with the hood CLOSED - the way it’s driven - not OPEN as with others.
Show quality polished. No off color paint or coatings to crack, peel, chip, discolor or seal in heat.
Proven KB crank drive concept. No grinding of front cover reg'd.

Lower parasitic loss and cooler air charge at the same cfm and boost – than competitions 2.9 3x5 rotors.
Mammoth™ rear induction manifold accepts stock 80mm - 168mm round throttle bodies for maximum air flow.
New more efficient 4x6 rotor profiles. Others use 2x2, 3x3, 4x4 or less efficient twin screw 3x5 lobe rotors.
Eliminates power robbing jackshaft, extra bearings, gears, pulleys, and small restictive front inlet manifold.
Retro “External” 60’s style Cool Air Kit w/ filter behind front bumper (no underhood hot air filter to rob 30HP).
Exposed top mount supercharger runs cooler. Not entombed in intake runners, intercooler and engine covers.
Developed and test proven on “one of a kind” high HP supercharger dyno, engine chassis dyno and flow bench.

* 2.8 vs. 2.9 tests run at same cfm clearly prove 2.8 superior. PC (power consumption or parasitic loss) and DT (discharge temps) were lower with 2.8 and we can prove it.


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Whisper quiet. No gear growl or clatter.
Flash Programmer (Kenne Bell calibrated).
Oil dipstick. No sight glass to discolor or stain.
20+ years experience in Twin Screw supercharging.
INSTANT BOOST. Optimum acceleration at any RPM.
Integral Intercooler (no exposed pipes, hoses and fittings).
Proven 6 rib belt system to 15 psi. Optional 8 rib for 8-24 psi.
Bypass valve air is AFTER intercooler (cooler and denser air).
Big efficient Kenne Bell “Dual Pass” intercooler and heat exchanger.
The industry’s most complete and best illustrated Installation Instructions.
Twin Screw supercharger. Lower power consumption and cooler air charge temps.
Easy to upgrade supercharger and throttle body for higher HP (Kenne Bell 168mm).
“Exposed” supercharger runs cooler. Not buried under manifolds, intercooler and covers.

FUEL SYSTEM - The KB BOOST A PUMP and 72lb injectors made 737RWHP on the automatic and 755RWHP on manual cars. That was max HP. Both will run low 10’s @ 16psi with 100% stock engines and suspension. And no headers, cams, heads, NOS etc. – just a 2.8 kit. The Boss 302 3.6L car tested for MM & FF Magazine made 845RWHP @ 21psi with a 100% stock fuel system and only a competition BOOST A PUMP and 80lb injectors.

Note: Stock fuel lines and rails are adequate, so save your money on expensive dual pump and plumbing upgrades.
MM & FF Magazine will be publishing the HP and fuel flow bench pump data with and without the BAP.

IGNITION – Firing fine with stock ignition so far. BOOST A SPARK will probably not be necessary until 25 + psi.

SPARK PLUGS - Do not use BRISK spark plugs with Kenne Bell kits. Use Motorcraft SP 524 (2.0L FOCUS).

The stock 5.0 uses a new style “short” EV14 injector in lieu of the popular and longer EV6 style. We chose the 47lb EV6 long style injectors on our 9-11 PSI 2.8 kits to make upgrading to a 60, 80, 120, 200lb etc. quick, easy and economical. Upgrading on a Kenne Bell Kit does not require raising fuel rails with spacer kits, injector adaptors or new fuel rails.

Note: Stock fuel rails will-and do- support 1200HP. At least they do on the Kenne Bell and Accufab dyno engines we’ve tested.

CLUTCH - The Centerforce Dual Disk will hold 1000HP yet has the same smooth low pedal pressure and driveability as stock.

TORQUE CONVERTER - PI (Performance Industries) dual clutch converter for high HP applications Prototype worked great.

SUSPENSION - The Eibach lowering kit is just right for height and ride quality. Just add the Nittos and hang on.

TIRES - Nitto NTO5R’s are hard to beat. We also use them on our Hemi’s, Camaros, and Shelby’ street test cars.

8 RIB KIT - See "Accessories." 6 rib good to 15 PSI. Use 8 rib above 15 PSI on 2.8 and 3.6 kits.

CAT BACK EXHAUST - Magnaflow 3” worked best lowering back pressure from 6psi to 0psi at 550RWHP, and + 10HP. Louder than stock but not objectionable.

ATI O.S. DAMPENER - We are working with ATI on 5.0 10,15 and 20% overdrive crank pulleys. Stock is 6.6" vs. 7.24”, 7.55” and 7.88” (+ 3PSI, + 4PSI and + 6PSI). We don’t sell ATI but it is the ONLY O.S. damper we’ve used that works reliably with the 5.0 and the ONLY damper we recommend. When using O.S. dampeners, use the correct 5.0” or 4.5” Kenne Bell 8 rib kit water pump pulley for clearance. Stock is 5.5” (6” with flange) leaving “O” clearance with an 8” lower.

Note: Since the Kenne Bell 2.8 is over 20% larger capacity than a 2.3, it will produce 5-7PSI more boost with the same size pullies (ratio). See what larger 2.8L superchargers do for you – 15PSI with the stock 6.6” dampener and 3.25” SC pulley vs. 8PSI for a 2.3.

CALIBRATION & CUSTOM TUNING - All Kenne Bell kits are calibrated in house except for “tuner kits.” Our kits do not require “custom tuning” unless modified, so save your money. We do not offer any custom tuning for headers, cams, throttle bodies, injectors etc. Check with us for a Kenne Bell Dealer Installer in your area if modifying our kits or adding product(s) that may affect driveability, emissions and/or performance. Also, Jon Lund Racing (610) 500-9545 is a “master tuner” who specializes in mail order calibration (tunes). We highly recommend Jon for any 5.0 custom tuning.

¼ MILE TESTS - 100% stock 5.0 w/cat back exhaust. Data will be supplied as testing is completed.
                             No Nitrous, gear changes, weight reduction, headers etc.

Click Here for Mammoth System Tech

Note: All Kenne Bell Camaro, Hemi and Ford Mammoth Kits (8-26psi) utilize the same huge 1400 HP rated “rear inlet” manifolds fed by equally large 4.5” Ram Air Pipes.