FROM THE DRIVER SEAT
Combining the GenX heads and TrackMax cam from Trick Flow Specialties with the LSX intake and MSD throttle body from FAST resulted in some serious power gains. Where the stock 5.3L produced 348 hp and 376 lb-ft of torque, our modified LM7 now thumped out peak numbers of 483 hp at 6,400 rpm and 438 lb-ft at 5,000 rpm. Though the mods shifted the power curve higher in the rev range, torque production exceeded 400 lb-ft from 4,000 rpm to 6,300 rpm, and the LM7 offered no less than 364 lb-ft down at 3,000 rpm (25 lb-ft more than the stock engine). The power curve could be shifted slightly with use of the smaller cam from Trick Flow Specialties, but we had a bigger and better idea to further enhance torque production. Stay tuned.

YOUR QUESTIONS ANSWERED

Time Spent Working: 7 Hours
Degree Of Difficulty: Moderate (Pulling the cam isn't tough, but experience helps)

Tools Needed:
8, 10, 12, 13, 15mm socket, in-lb torque wrench, lb-ft torque wrench, gear puller, flare nut wrenches

Parts Used:
Trick Flow GenX 205 heads 30500001 $1,995.95
Trick Flow TrackMax camsahft 30602002 $349.95
FAST LSX intake manifold 146302 $949.95
MSD Injection 92mm throttle body $549.95
Wilson LSX fuel rails 422031 $207.95

Total: $4,053.75
(All prices from summitracing.com do not include tax, shipping, or installation)

SOURCE
Trick Flow Specialties
1248 Southeast Avenue
Tallmadge
OH  44278
330-630-1555
http://www.trickflow.com
Holley/Hooker
1801 Russellville Road
Bowling Green
KY  42101
270-782-2900
www.holley.com
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
http://www.compcams.com
Demon Engines
Sante Fe Springs
CA
562-694-2559
www.demonengines.com
Summit Racing
Akron
OH
800-230-3030
330-630-0240
http://www.summitracing.com/
L&R Automotive
13731 Bora Drive
Sante Fe Springs
CA  90670
562-802-0443
www.lnrengine.com