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Top Street Performance

Universal 4-Barrel EFI Billet Aluminum Throttle Body - Natural

Universal 4-Barrel EFI Billet Aluminum Throttle Body - Natural

SKU: 81049-1

$522.50
$522.50 $593.75
Shipping calculated at checkout.

In stock

Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.

Product Details

Features

  • 1,000 CFM 6061-T6 billet aluminum throttle body fits standard 4150 flanges
  • 4-bore, 1.75" per bore design for strong EFI airflow response
  • Cable-actuated with 700R4-style kickdown provision
  • IAC, TPS & MAP sensor not included; cross-reference part numbers given

Description

This 6061-T6 billet aluminum throttle body is designed for universal 4150-flange EFI applications, supporting responsive airflow control and clean fitment on properly matched intake setups. At 1.75" per bore across 4 bores, it's rated for approximately 1,000 CFM, sized to match airflow capacity with your intake manifold and engine combination.

Throttle actuation is cable-driven — this is not a drive-by-wire throttle body, so confirm your setup uses cable actuation before ordering. It has the correct geometry for the 700R4 kickdown. It accepts a standard 5-1/8" air cleaner flange. Gasket and mounting hardware are included; the IAC motor, TPS, and MAP sensor are not included, since these vary by ECU and tuning setup.

Confirm intake bore size, throttle control style, sensor configuration, and tuning requirements before installation — tuning may be required after installation depending on your specific EFI setup.


Applications
Fits manifolds with a standard 4150-style square-bore flange and standard bolt spacing. Common use cases include street performance applications, restoration projects, and custom EFI conversions.

Installation
Cable-actuated (700R4-style provision), 5-1/8" air cleaner flange. Gasket and mounting hardware included. IAC motor, TPS, and MAP sensor not included — see compatible part numbers below. Confirm throttle body bore size, 4150 flange compatibility, cable bracket needs, and hood clearance before final assembly.

 

Compatible Sensor Components (sold separately)

IAC (Idle Air Control Motor): GM #19333273 or Delphi #CV10027
TPS (Throttle Position Sensor): AC Delco #213-895 or GM #17106681
MAP Sensor: GM #12614973 or AC Delco #213-796

Confirm sensor and connector compatibility with your ECU before ordering replacement sensors.

Specs

Bore Diameter 1.75" (Per Bore)
Fuel System Grade Performance
Fuel System Injection Type Throttle Body
Fuel System Type Electronic Fuel Injection
Throttle Body Bolt Pattern 4150 Square Bore
Throttle Body Finish Natural
Throttle Body Material 6061-T6 Aluminum
Throttle Body Type Drive by Cable
Venturi Quantity 4
Fuel Injectors Included No
Gasket Or Seal Included Yes
Mounting Hardware Included Yes
Throttle Body Spacer Included No
Not Included TPS (Throttle Position Sensor)
IAC (Idle Air Control Motor)
MAP Sensor

Engine Fitment

COMPATIBLE WITH
UNIVERSAL 4150-FLANGE EFI THROTTLE BODY APPLICATIONS
• Fits manifolds with a standard 4150-style square-bore flange and standard bolt spacing
• 4-barrel, 1.75" bore (4 bores), rated for approximately 1,000 CFM
• Throttle actuation: Cable (700R4-style cable provision)
• Accepts a standard 5-1/8" air cleaner flange

NOTES
• Does not include the IAC motor, TPS, or MAP sensor
• Compatible components:
– IAC (Idle Air Control Motor): GM #19333273 or Delphi #CV10027
– TPS (Throttle Position Sensor): AC Delco #213-895 or GM #17106681
– MAP Sensor: GM #12614973 or AC Delco #213-796
• Confirm sensor and connector compatibility with your ECU before ordering replacement sensors
• Verify throttle body bore size, 4150 flange compatibility, cable bracket needs, and hood clearance before final assembly
• Tuning may be required after installation depending on your specific EFI setup

COMMON VEHICLE APPLICATIONS
Street performance applications
Restoration projects
Custom EFI builds

Q&A

Is this drive-by-wire or cable-actuated?
Cable-actuated with the correct geometry for the 700R4 kickdown

What CFM is this throttle body rated for?
Approximately 1,000 CFM, across 4 bores at 1.75" per bore.

Does this include the IAC, TPS, or MAP sensor?
No — these are not included. Compatible part numbers: IAC (GM #19333273 or Delphi #CV10027), TPS (AC Delco #213-895 or GM #17106681), MAP Sensor (GM #12614973 or AC Delco #213-796). Confirm sensor and connector compatibility with your ECU before ordering.

What air cleaner size does this accept?
A standard 5-1/8" air cleaner flange.

Does this come with a gasket and mounting hardware?
Yes — gasket and mounting hardware are included.

What manifolds does this fit?
Any manifold with a standard 4150-style square-bore flange and standard bolt spacing — this is a universal fit, not limited to one engine family.

QWhat grade of aluminum is this throttle body made from?
6061-T6 billet aluminum.

Emissions Notice

This product does not require an Executive Order in California. By nature of its design this product does not require an emissions certification.