Our 1995 Mustang GT project car is becoming quite the little powerhouse. Thanks to infusions of go-fast, turn-better, and stop-now parts from the Summit and Trick Flow brands-plus a big shot of color from Tallmadge Collision-we have a hot five liter that gets noticed out on the boulevard.

For those who are just joining us, here are the upgrades we made so far:
Stage One
• Summit Voltmax X-Treme Wire and Cap Kit
• Summit TFI Coil
• Summit Cold Air Intake
• Summit 75mm Mass Air Flow Sensor
• Summit Aluminum Underdrive Pulleys
• Summit 2.5 inch Cat-Back Exhaust
• Summit Short Throw Shifter
• Summit Adjustable Clutch Quadrant Kit
Rear-Wheel Power Increase: 10 horsepower, 8 foot-pounds of torque

Stage Two
• Summit 75mm Throttle Body
• Summit 80mm Mass Air Flow Sensor
• Summit 30 lb. Injectors
• Trick Flow Track Heat Roller Cam (221°/225° duration, .499/.510 inch lift)
• Summit Roller Lifters
• Summit Billet Roller Timing Chain
• Summit 2.5 inch Off-Road H-Pipe (Non-Catalyst)
• Summit 1 5/8 inch Shorty Headers
• Summit Lowering Spring Kit
• Summit Rear Control Arm Kit
• Summit Cross-Drilled Brake Rotors
• American Racing Killer Wheels, 18 x 8.5
• BFGoodrich g-Force T/A KDW Tires, 245/35ZR-18
Rear-Wheel Power Increase: 25 horsepower, 4 foot-pounds of torque

In this installment of 5.0 Revival, we're gonna turn up the wick several notches with a pair of free-breathing Trick Flow Twisted Wedge® Street aluminum cylinder heads, a Track Heat® EFI intake manifold, and 1.6 ratio roller rocker arms. This top end upgrade will seriously improve our small block's breathing capacity. And since an engine is basically an air pump, the more atmosphere you can feed it, the more power it can make. Let's take a look at our new Trick Flow goodies.

Twisted Wedge Street Cylinder Heads
Trick Flow got its start with aluminum cylinder heads for small block Fords. In 1995, the company introduced a revolutionary concept-the Twisted Wedge cylinder head. As the name implies, the head features combustion chambers with intake and exhaust valves rotated so they are centered almost directly over the cylinder bores. This unshrouds the valves (especially the intake) to increase airflow into the chambers. The spark plug location was also moved closer to the center of the cylinder to help improve the burn of the incoming air and fuel.

The shape of the 61cc Twisted Wedge combustion chamber allows Trick Flow to stuff in larger 2.02 inch intake and 1.60 inch exhaust valves and still use a factory-style flat top piston with cams up to .540 inches of lift. With bigger cams, you'll need pistons compatible with the relocated valve setup. These are readily available from Trick Flow and other piston manufacturers.

Other features of the Twisted Wedge Street cylinder head include a thick .560 inch deck and chamber walls, 170cc intake and 66cc exhaust ports, and extra support risers in the water jacket to increase casting stiffness and promote better head gasket sealing. Our heads came fully assembled with valves, 1.46 inch valve springs, locks, retainers, pushrod guideplates, and 3/8 inch rocker arm studs. You can get the Twisted Wedge Street heads bare or assembled, with or without machined O-ring grooves for use with Fel-Pro Loc-Wire® gaskets, and your choice of as-cast or CNC-machined ports and chambers.

Track Heat EFI Intake Manifold
It doesn't make a lot of sense to bolt on a pair of free-flowing cylinder heads only to starve them with a restrictive intake manifold. In a fit of clear-headed thinking, we replaced the factory intake with a Trick Flow Track Heat EFI intake manifold. One of four versions made for fuelie 5.0s and 351 Windsors, the Track Heat is ideal for modified street engines (heads, calibrated Mass Air Flow sensor, bigger throttle body and injectors, exhaust upgrades, etc.) with a powerband from 1,500 to 6,500 rpm. It accepts a 75mm throttle body and has ports and connections for most factory sensors. The Track Heat is not EGR-compatible, so it may not be emissions-legal in some areas. Fortunately, Trick Flow's Street Burner intake is 50-state emissions-legal and is a fine upgrade from stock.

Other Stuff
Trick Flow provided other pieces as well-1.6 ratio roller rocker arms for a little added valve lift, heck-for-stout 3/8 inch chromemoly pushrods, and a pair of silver powdercoated aluminum valve covers. We also acquired a throttle body adapter (required for the SN-95 cars) and a 3/8 inch tall EFI heat spacer to keep the throttle body and Mass Air Flow sensor from hitting the tall-style valve covers.

Dyno Results
If you've followed along with our 5.0 Revival series, you know what comes next-a trip to BigShot Dyno and Performance to rack up some power gains. And rack up we did-over 41 horsepower at the rear wheels. What's more, the powerband moved up, with peak power and torque happening approximately 500 rpm later than during the Stage 2 dyno pulls. That means extra oomph up top. When you look at the dyno chart, you'll also see the power and torque curves are broader, indicating more power being made all across the 5.0's rpm range. That's what free breathing can do for an engine.

What's Next
On the agenda for Stage 4 is a one heck of a change-a complete Summit 347 cubic inch short block, brand new from the block on up. The world-famous NMRA engine builders at Fox Lake Racing will be machining and assembling the short block, then swapping the top end from the current five liter to the new 347. Make sure to tune in to see what an extra 47 cubic inches can do to our Mustang's rear tires!

TFS-51400004 Trick Flow Twisted Wedge Street Cylinder Heads, pair
TFS-51500002 Trick Flow Track Heat 5.0 EFI Intake Manifold, silver, each
TFS-51400510 Trick Flow Roller Rocker Arms, 1.6 ratio, set of 16
TFS-21406700 Trick Flow Chromemoly Pushrods, 6.700
TFS-5150SN95 Trick Flow SN95 Throttle Body Adapter, each
TFS-51400801 Trick Flow Valve Covers, standard height, silver powdercoat, pair
TFS-51400800 Trick Flow Billet Oil Fill Kit, each
TFS-51520007 Trick Flow EFI Heat Spacer for TFS Street Burner/Track Heat Intakes, 3/8"