Trans-Dapt Performance Products' TORQUE-CURVE Multi-Port Fuel Injection (MPFI) Throttle Body spacers perform better than any other MPFI Spacer on the market... and quieter too.

Trans-Dapt's Multi-Port Fuel Injection (MPFI) Spacers are 50 STATE LEGAL (EXCLUDING 2573 and 2773), and covered by C.A.R.B. Executive Order #D-578-1 (11/16/12).
 
Part # ApplicationDescriptionExhaust System DiaFinishKEY FEATURE Media
2564
 
Chevrolet Astro 1996 to 2004

Liter: 4.3

 
Chevrolet Express 1500 1996 to 2004

Liter: 4.3

 
Chevrolet S10 1996 to 2004

Liter: 4.3

 
Chevrolet Silverado 1500 1999 to 2004

Liter: 4.3

 
GMC Savana 1500 1996 to 2004

Liter: 4.3

 
GMC Sierra 1500 1999 to 2004

Liter: 4.3

 
GMC Sonoma 1996 to 2004

Liter: 4.3

 
GMC Jimmy 1996 to 2001

Liter: 4.3

 
Chevrolet C1500 1996 to 1998

Liter: 4.3

 
Chevrolet K1500 1996 to 1998

Liter: 4.3

 
GMC C1500 1996 to 1998

Liter: 4.3

 
GMC K1500 1996 to 1998

Liter: 4.3

1996-2006 CHEVROLET/GMC S10(Blazer), S15 (Jimmy), Sonoma with 4.3L
Photo
$59.03
2567
 
Chevrolet C2500 1996 to 2000

Liter: 7.4

 
Chevrolet C3500 1996 to 2000

Liter: 7.4

 
Chevrolet Express 3500 1996 to 2000

Liter: 7.4

 
Chevrolet K2500 1996 to 2000

Liter: 7.4

 
Chevrolet K3500 1996 to 2000

Liter: 7.4

 
GMC C2500 1996 to 2000

Liter: 7.4

 
GMC C3500 1996 to 2000

Liter: 7.4

 
GMC K2500 1996 to 2000

Liter: 7.4

 
GMC K3500 1996 to 2000

Liter: 7.4

 
GMC Savana 3500 1996 to 2000

Liter: 7.4

 
Chevrolet C2500 Suburban 1996 to 1999

Liter: 7.4

 
Chevrolet K2500 Suburban 1996 to 1999

Liter: 7.4

 
GMC C2500 Suburban 1996 to 1999

Liter: 7.4

 
GMC K2500 Suburban 1996 to 1999

Liter: 7.4

 
Chevrolet G30 1996

Liter: 7.4

 
GMC G3500 1996

Liter: 7.4

1996-00 BB Chevy/GMC 2500-3500 Trucks, SUVs and Motorhomes with 7.4L
Photo
$59.03
2570
 
Ford Excursion 2000 to 2003

Liter: 5.4

 
Ford F-250 Super Duty 1999 to 2003

Liter: 5.4

 
Ford F-350 Super Duty 1999 to 2003

Liter: 5.4

 
Ford F-250 1999

Liter: 5.4

1999-04 Ford F250 or F350 WITH 5.4L
Photo
$59.03
2571
 
Dodge Ram 2500 1994 to 2002

Liter: 8.0

 
Dodge Ram 3500 1994 to 2002

Liter: 8.0

1994-02 Dodge Ram 2500 or 3500 with V10
Photo
$72.16
2515
 
Dodge Ram 1500 1994 to 2002

Liter: 5.9, 5.2, 3.9

 
Dodge Ram 2500 1994 to 2002

Liter: 5.9, 5.2

 
Dodge Ram 3500 1994 to 2002

Liter: 5.9

 
Dodge Ramcharger 1992 to 1993

Liter: 5.9, 5.2

1992-02 Dodge Ram 1500, 2500, 3500 with 3.9L, 5.2L, or 5.9L
Photo
$59.03

Trans-Dapt Performance Products' TORQUE-CURVE Multi-Port Fuel Injection (MPFI) Throttle Body spacers perform better than any other MPFI Spacer on the market…and quieter too.

HOW DO THEY WORK?
Like a two part epoxy, the air/fuel mixture in your engine needs to be a specific ratio of air to fuel, in order for it to work properly. Your vehicle's EFI system constantly adjusts this ratio to best suite the environmental and driving conditions at any given moment. If your engine needs more air, and your throttle body can't meet that need, your overall performance diminishes.

At partial throttle, a negative pressure zone forms on the upper back side of the throttle blade. Since air will always flow to a low pressure area, incoming air gets drawn to it, like a vacuum. This low pressure condition creates turbulence, which slow down the introduction of air in to your intake manifold. Less available air means, less available power.

Torque-Curve's unique port design affects airflow in your engine's throttle body, by eliminating this low pressure area, and speeding up the introduction of air in to your intake manifold. Ultimately this improves your engine's performance and fuel efficiency. Although we still offer our original "Smooth Bore", and "Wide Open" plenum MPFI spacers, our exclusive Torque-Curve design spacers far surpass all other spacers in both performance and popularity.

CHASSIS DYNO RESULTS
The charts to the right show the results of Chassis dyno testing  of the TORQUE-CURVETM Spacer design on a 2004 GMC Truck Pick-up Truck with a 4.8L engine.

 

 

 

 
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