Categories

C8 Corvette LT2 LT6 LT7 E-Ray

C7 Stingray, Z06, GS, ZR1

C5 C6 Z06 ZR1 GS Corvette

2010-13 Grand Sport Corvette

Air Intakes - Corvette

Apparel and Accessories

Corvette Audio/Electronics

Corvette Brakes

Corvette Car Care

Corvette Car Covers

Corvette Drivetrain

Corvette Engine Performance

A/C Compressors

Blocks & Strokers

C5 / Z06 Engine Dress-up

C6/C5 Corvette CHROME

C6/GS/Z06/ZR1 Engine Dress-up

Camshafts & Valvetrain

Corvette Cooling

Corvette Lubrication

Corvette Plumbing

Corvette Synthetic Fluids

Cylinder Heads

Fastners, Bolts, Studs

Gauges, Shift Lights, Mounts

Ignition/Fuel

Intake Manifolds, Throttle Bodies

LS Engine Components

Misc. Engine Parts

Crate Engines

Corvette Floor Mats

Corvette Ladies Apparel

Corvette Race Gear

Corvette Seat Covers, Protection

Corvette Tools

Decals, Graphics, Emblems, Stripes

Exhaust - C5/C6 Corvette

Exterior - Corvette

Group Purchase

Interior - Corvette

Lighting - Corvette

Nitrous Systems Corvette

Performance Packages

Performance Tuning

Pitstop Furniture

Superchargers/Turbo

Suspension - Corvette

Wheels / Tires Corvette

ZR1 Carbon Fiber 2009-13

2010-2015 Camaro, 5th Gen

2016-2024 Camaro, 6th Gen

1982-2002 Camaro/Trans AM

C4, C4/ZR1 Corvette 84-96

C3 Corvette 68-82

C2 Corvette 63-67

C1 Corvette 53-62

Corvette Collection Apparel

All Vehicles

Cadillac CTS, 2000-2024

Ford Mustang

New Products

SPECIALS

Information

Manufacturers

Featured

C8 Corvette, Mens Next Generation 2020 FLAG FLIGHT JACKET

C8 Corvette, Mens Next Generation 2020 FLAG FLIGHT JACKET
$109.99

Latest products

Moroso Street/Strip Engine Oil Pan - GM LS-Series - 6 in Deep

Moroso Street/Strip Engine Oil Pan - GM LS-Series - 6 in Deep
$594.99

Brian Tooley Racing LT1/L86 Conical Spring Kit 0.650 in Lift - SK013

Brian Tooley Racing LT1/L86 Conical Spring Kit 0.650 in Lift - SK013
$449.99

Cloyes Heavy Duty Timing Chain Set - GM LS-Series - Steel

Cloyes Heavy Duty Timing Chain Set - GM LS-Series - Steel
$75.99

S-A Books 152 Pages Book - How To Rebuild GM LS-Series Engines

S-A Books 152 Pages Book - How To Rebuild GM LS-Series Engines
$24.99

Melling Camshaft/Lifters/Guides/Thrust Plate/VVT - GM Fullsize Truck/SUV 2014-21

Melling Camshaft/Lifters/Guides/Thrust Plate/VVT - GM Fullsize Truck/SUV 2014-21
$632.99

Granatelli 1984 Chevrolet Corvette 5.7L V8 0-Ohm Spark Plug Wires - 28-1374S

Granatelli 1984 Chevrolet Corvette 5.7L V8 0-Ohm Spark Plug Wires - 28-1374S
$159.60

2020-2026 C8 Corvette Rear Inner Fender 6Pcs Painted Set - Jake Skull / NO / No

2020-2026 C8 Corvette Rear Inner Fender 6Pcs Painted Set - Jake Skull / NO / No
$399.95

Granatelli Coil-On-Plug Connectors - 28-1814S

Granatelli Coil-On-Plug Connectors - 28-1814S
$170.46

Fel-Pro 1.26 x 2.07 in Rectangular Port Intake Manifold - GM LT-Series 1992-97

Fel-Pro 1.26 x 2.07 in Rectangular Port Intake Manifold - GM LT-Series 1992-97
$24.99

2020-27 C8 Corvette Z06 Engine Builder Plaque, Competition Yellow

2020-27 C8 Corvette Z06 Engine Builder Plaque, Competition Yellow
$149.99

Product 746 of 798 in category LS Engine Components

GM Genuine Parts LT1 & LT4 Exhaust Valve

GM Genuine Parts LT1 & LT4 Exhaust Valve

$33.99

Model: GMP-12678746 Manufacturers: Katech

Qty:

Add to Wish List

Description

GM Genuine Parts LT1 & LT4 Exhaust Valve

GM Genuine Parts LT1 & LT4 Exhaust Valve

Sold Individually Valve

Product Specifications

Length	2.91 in
Locks Included	No
Seat Angle	45 °
Classification	OE
Valve Head Diameter	0.86 in
Material	Steel
Lock Groove Quantity	1

GM Part # 12678746

ACDelco Part # 12678746

WARNING: Cancer and Reproductive Harm -- www.P65Warnings.ca.gov

This product was added to our catalog on Thursday 17 September, 2026.

Points & Rewards Information

Points Credit : 34 points Currently valued at $1.02 Write a Review and earn $1.5 worth of points. Please check the Reward Point Program FAQ for more information.

Product 746 of 798 in category LS Engine Components

Categories

C8 Corvette LT2 LT6 LT7 E-Ray

C7 Stingray, Z06, GS, ZR1

C5 C6 Z06 ZR1 GS Corvette

2010-13 Grand Sport Corvette

Air Intakes - Corvette

Apparel and Accessories

Corvette Audio/Electronics

Corvette Brakes

Corvette Car Care

Corvette Car Covers

Corvette Drivetrain

Corvette Engine Performance

A/C Compressors

Blocks & Strokers

C5 / Z06 Engine Dress-up

C6/C5 Corvette CHROME

C6/GS/Z06/ZR1 Engine Dress-up

Camshafts & Valvetrain

Corvette Cooling

Corvette Lubrication

Corvette Plumbing

Corvette Synthetic Fluids

Cylinder Heads

Fastners, Bolts, Studs

Gauges, Shift Lights, Mounts

Ignition/Fuel

Intake Manifolds, Throttle Bodies

LS Engine Components

Misc. Engine Parts

Crate Engines

Corvette Floor Mats

Corvette Ladies Apparel

Corvette Race Gear

Corvette Seat Covers, Protection

Corvette Tools

Decals, Graphics, Emblems, Stripes

Exhaust - C5/C6 Corvette

Exterior - Corvette

Group Purchase

Interior - Corvette

Lighting - Corvette

Nitrous Systems Corvette

Performance Packages

Performance Tuning

Pitstop Furniture

Superchargers/Turbo

Suspension - Corvette

Wheels / Tires Corvette

ZR1 Carbon Fiber 2009-13

2010-2015 Camaro, 5th Gen

2016-2024 Camaro, 6th Gen

1982-2002 Camaro/Trans AM

C4, C4/ZR1 Corvette 84-96

C3 Corvette 68-82

C2 Corvette 63-67

C1 Corvette 53-62

Corvette Collection Apparel

All Vehicles

Cadillac CTS, 2000-2024

Ford Mustang

New Products

SPECIALS

Information

Manufacturers

Featured

C8 Corvette, Mens Next Generation 2020 FLAG FLIGHT JACKET

C8 Corvette, Mens Next Generation 2020 FLAG FLIGHT JACKET
$109.99

Latest products

Moroso Street/Strip Engine Oil Pan - GM LS-Series - 6 in Deep

Moroso Street/Strip Engine Oil Pan - GM LS-Series - 6 in Deep
$594.99

Brian Tooley Racing LT1/L86 Conical Spring Kit 0.650 in Lift - SK013

Brian Tooley Racing LT1/L86 Conical Spring Kit 0.650 in Lift - SK013
$449.99

Cloyes Heavy Duty Timing Chain Set - GM LS-Series - Steel

Cloyes Heavy Duty Timing Chain Set - GM LS-Series - Steel
$75.99

S-A Books 152 Pages Book - How To Rebuild GM LS-Series Engines

S-A Books 152 Pages Book - How To Rebuild GM LS-Series Engines
$24.99

Melling Camshaft/Lifters/Guides/Thrust Plate/VVT - GM Fullsize Truck/SUV 2014-21

Melling Camshaft/Lifters/Guides/Thrust Plate/VVT - GM Fullsize Truck/SUV 2014-21
$632.99

Granatelli 1984 Chevrolet Corvette 5.7L V8 0-Ohm Spark Plug Wires - 28-1374S

Granatelli 1984 Chevrolet Corvette 5.7L V8 0-Ohm Spark Plug Wires - 28-1374S
$159.60

2020-2026 C8 Corvette Rear Inner Fender 6Pcs Painted Set - Jake Skull / NO / No

2020-2026 C8 Corvette Rear Inner Fender 6Pcs Painted Set - Jake Skull / NO / No
$399.95

Granatelli Coil-On-Plug Connectors - 28-1814S

Granatelli Coil-On-Plug Connectors - 28-1814S
$170.46

Fel-Pro 1.26 x 2.07 in Rectangular Port Intake Manifold - GM LT-Series 1992-97

Fel-Pro 1.26 x 2.07 in Rectangular Port Intake Manifold - GM LT-Series 1992-97
$24.99

2020-27 C8 Corvette Z06 Engine Builder Plaque, Competition Yellow

2020-27 C8 Corvette Z06 Engine Builder Plaque, Competition Yellow
$149.99

Shopping Cart

My Account Info

Live Support

Advanced Search

Latest Specials

C6 "CORVETTE" Mirror Finish Rear Stainless Steel Letter Inserts, Fits all Model C6 Corvette

C6 "CORVETTE" Mirror Finish Rear Stainless Steel Letter Inserts, Fits all Model C6 Corvette
~~$66.30~~ $58.46

Notifications

Notify me of updates to GM Genuine Parts LT1 & LT4 Exhaust Valve

Payments Accepted

Social Networking

Trade Associations

C6 Performance is a Proud Member of SEMA Proud Member of The National Corvette Museum

Home

Specials

My Account

Call Us:

C6 Performance / C8 Motorsports LLC
2950 Buskirk Ave. Suite 300
Walnut Creek, California 94596
USA
Tel: Toll Free 1-866-893-2090 Sales: x101
Local: 1-925-952-9110
Fax: 866-931-5531
Email: [email protected]

Win with C6 Performance, the Best place for quality C8, C7, C6, C5 Grand Sport, ZR1 and Z06 Corvette and Camaro Parts
WARNING: Cancer and Reproductive Harm - www.P65warnings.ca.gov
All Content COPYRIGHT 2000-2025 C8 Motorsports LLC dba C6 Performance and Loaded Commerce. All Rights Reserved.