Full unit shot throttle body adapter plate for GM LS engine
Front face view throttle body adapter plate for GM LS engine
Kit layout throttle body adapter plate installation kit for GM LS engine
Laid flat view throttle body adapter plate included parts for GM LS engine
Official shot EGR Performance throttle body adapter plate for GM LS engine
Throttle Body Adapter Plate for LS2 LS3 GM LS Engine Applications - image 6
Throttle Body Adapter Plate for LS2 LS3 GM LS Engine Applications - Product Image 7
Full unit shot throttle body adapter plate for GM LS engine
Front face view throttle body adapter plate for GM LS engine
Kit layout throttle body adapter plate installation kit for GM LS engine
Laid flat view throttle body adapter plate included parts for GM LS engine
Official shot EGR Performance throttle body adapter plate for GM LS engine
Throttle Body Adapter Plate for LS2 LS3 GM LS Engine Applications - image 6
Throttle Body Adapter Plate for LS2 LS3 GM LS Engine Applications - Product Image 7

Throttle Body Adapter Plate for LS2 LS3 GM LS Engine Applications

$26.44
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Details
Brand Model Year Engine Model
GM LS engine applications with 4 bolt LS intake Verify by VIN LS2, LS3, LH6, L92, L76, LY2, LY5, LY6, LC9, LFA, LH8, LMG, L98, L9H, L20, L94, LZ1, L99, L96, LC8, L77

✅ Exact Fitment Guarantee | If you are unsure about compatibility, contact us at service@egrperformance.com with your VIN.

Intro Section

  • Throttle body adapter plate solves 4 bolt intake to 3 bolt throttle body mismatch.
  • Designed for GM LS engine builds using LS2 or LS3 style 4 bolt intake manifolds.
  • 75mm through hole supports throttle bodies up to 75mm and intakes up to 102mm.
  • Review fitment, exclusions, package contents, and install checks before ordering.
Shipping Details

Ontario CA / Springdale OH / Newark NJ
Package List

Complete Package Contents

  • 14 bolt intake to 3 bolt throttle body adapter plate.
  • 1throttle body adapter gasket.
  • 1 setthrottle body adapter mounting hardware.
Delivery Time

2-5 working days inland in the United States

Product details

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Product Overview

  • Adapter type:4 bolt LS intake to 3 bolt throttle body adapter plate.
  • Primary use:Installs a 3 bolt DBW LS throttle body on a 4 bolt LS intake.
  • Material:Aluminum with natural finish.
  • Included parts:Adapter plate, gasket, and mounting hardware set.
  • Important exclusion:Does not work with LS4 intakes.

Ideal For

  • LS intake swap:Solve 4 bolt intake and 3 bolt throttle body mismatch.
  • DBW throttle body install:Solve mounting pattern conflict on LS intake.
  • LS2 or LS3 intake use:Solve adapter need for 3 bolt DBW throttle body.
  • Fitment verification:Solve uncertainty before final LS intake assembly.

Technical Specifications

  • Product type:Throttle body adapter plate.
  • Intake side:4 bolt LS intake manifold pattern.
  • Throttle body side:3 bolt LS throttle body pattern.
  • Throttle body limit:Up to 75mm or 2.95in.
  • Intake manifold limit:Up to 102mm or 4.02in.
  • Through hole:75mm.
  • Material:Aluminum.
  • Finish:Natural aluminum finish.
  • Connector quantity:3.
  • OE status:Not an OEM factory part.

Why Choose EGR Performance

  • Fitment Support:Solve compatibility questions by VIN email check.
  • Warranty Support:Solve defect risk with 1 Year Limited Warranty.
  • US Buyer Support:Solve order concerns through service@egrperformance.com.
  • Clear Exclusions:Solve wrong purchase risk for LS4 and 3 bolt DBC setups.

Installation Information

Installation Difficulty Level

Easy

Estimated Installation Time

1-2 hours

Required Tools

  • Socket set.
  • Ratchet.
  • Torque wrench.
  • Screwdriver set.
  • Clean shop towel.

Step-by-Step Installation Overview

  • Disconnect the battery before intake service.
  • Remove the throttle body from the intake manifold.
  • Place the adapter plate and gasket on the intake.
  • Install the throttle body with included hardware.
  • Inspect seal contact and reconnect components.

No printed instructions included. Professional installation is highly recommended. For technical support, contact service@egrperformance.com.

Troubleshooting and Problem Solving

Common Issues After Installation

  • Vacuum leak:Gasket not seated or hardware not tightened evenly.
  • High idle:Air leak at adapter plate or throttle body flange.
  • Poor throttle response:Throttle body not aligned on adapter opening.
  • Fitment conflict:Vehicle has LS4 intake or 3 bolt DBC throttle body.

Error Code Solutions

  • P0101:MAF range issue - inspect air leaks and intake connections.
  • P0121:Throttle position issue - verify throttle body connection and reset.
  • P0507:Idle speed high - inspect gasket seal and flange seating.
  • P2135:TPS correlation issue - check throttle body wiring and relearn needs.

How to Reset Check Engine Light After Installation

  • Correct any air leak or connection issue first.
  • Disconnect the battery for service reset if applicable.
  • Use an OBD2 scan tool to clear stored codes.
  • Perform an idle check after restart.

What to Do If Your Vehicle Loses Power After Installation

  • Stop driving and inspect all intake connections.
  • Check that the gasket is not folded or pinched.
  • Confirm throttle body type matches the adapter use.
  • Scan for active DTCs before further driving.
  • Email service@egrperformance.com with VIN and photos.

Core Advantages

  • 75mm Through Hole:Supports throttle body openings up to 75mm.
  • 102mm Intake Compatibility:Works with intake manifolds up to 102mm.
  • 3 Bolt Interface:Adapts 3 bolt throttle body to 4 bolt LS intake pattern.
  • Kit Coverage:Includes 1 gasket and 1 mounting hardware set.

Complete Package Contents

  • 14 bolt intake to 3 bolt throttle body adapter plate.
  • 1throttle body adapter gasket.
  • 1 setthrottle body adapter mounting hardware.

Long-Term Maintenance Tips

  • Gasket Check:Inspect every 6 months to prevent vacuum leaks.
  • Hardware Check:Inspect every 6 months to prevent loose mounting.
  • Flange Cleaning:Clean during throttle service to prevent poor sealing.
  • DTC Scan:Scan after installation to catch air or throttle faults early.

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Vehicle Fitment

  • Fitment basis:Engine and intake pattern based LS application.
  • Compatible engine models:LS2, LS3, LH6, L92, L76, LY2, LY5.
  • Compatible engine models:LY6, LC9, LFA, LH8, LMG, L98, L9H.
  • Compatible engine models:L20, L94, LZ1, L99, L96, LC8, L77.
  • Compatible intake:4 bolt LS intake manifold up to 102mm.
  • Compatible throttle body:3 bolt DBW LS throttle body up to 75mm.
  • Not compatible:LS4 intakes.
  • Not compatible:3 bolt drive by cable throttle body setups.
  • Send your VIN to service@egrperformance.com before ordering if unsure.
  1. Dispatch Time: Orders will be shipped within 24 hours after successful payment.
  2. Delivery Time: 2-5 business days after dispatch (delivery speed depends on proximity to warehouse location).
  3. Return Window:7 days for unsatisfactory items45 days for quality-related issues
  4. Refund Processing: Refunds will be processed back to your original payment method within 2-4 business days after receiving the automated refund confirmation email (subject to bank verification).

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Will this throttle body adapter fit my LS engine?

It fits listed LS engine applications using a 4 bolt LS intake and 3 bolt DBW throttle body.

Does this fit an LS3 intake manifold?

Yes, the source fitment notes include LS3 style 4 bolt LS intake manifold use.

Does this fit an LS2 intake manifold?

Yes, the source fitment notes include LS2 style 4 bolt LS intake manifold use.

Is this for drive by wire or drive by cable throttle bodies?

The adapter is listed for 3 bolt DBW LS throttle bodies, not 3 bolt DBC units.

Will this work with an LS4 intake?

No, the source fitment notes state that it does not work with LS4 intakes.

What throttle body size does it support?

It supports throttle bodies up to 75mm or 2.95in.

What intake manifold size does it support?

It supports intake manifolds up to 102mm or 4.02in.

Is the gasket included?

Yes, the package includes 1 throttle body adapter gasket.

Is mounting hardware included?

Yes, the package includes 1 mounting hardware set.

What material is the adapter made from?

The adapter plate is made from aluminum.

Is this an OEM factory part?

No, this is an EGR Performance aftermarket part and is not an OEM factory part.

Do I need printed instructions?

No printed instructions are included, and professional installation is recommended.

Can this adapter fix a 4 bolt to 3 bolt mismatch?

Yes, it adapts a 4 bolt LS intake to a 3 bolt LS throttle body pattern.

What should I do if I get a high idle after installation?

Inspect gasket seating, flange alignment, and hardware tightness for air leaks.

How do I confirm compatibility before ordering?

Email your VIN to service@egrperformance.com for fitment support.

What warranty is included?

1 Year Limited Warranty against manufacturing defects.