Manley Exhaust Valve Steel for GM LS Engines

Description

Product Overview

The Manley Exhaust Valve Race Series (model 11621-8) is engineered for GM LS‑Series engines, offering a high‑strength steel construction that resists heat and corrosion. With a compact 1.59‑inch threaded inlet and SAE outlet, the valve provides a precise seal and consistent exhaust flow. Dimensions of 144 × 84 × 36 mm and a lightweight 1.99 lb design make it easy to install while maintaining durability. Finished with a painted exterior, it blends functionality with a clean appearance.

Usage

Designed for performance enthusiasts and professional mechanics, this valve excels in street‑driven vehicles, track cars, and high‑output applications. It fits vehicle‑specific GM LS engines, delivering reliable exhaust control during aggressive driving, tuning, or routine maintenance.

Why Choose Us

Manley’s reputation for precision engineering ensures each valve meets strict OEM standards. The use of premium steel and meticulous machining guarantees long‑term reliability, even under extreme temperatures. Backed by a non‑discontinued status and positive customer reviews, this valve offers confidence and value for demanding automotive projects.

Key Features

• Durable steel construction for high heat resistance
• Threaded 1.59″ inlet and SAE 1.59″ outlet for secure connections
• Vehicle‑specific fit for GM LS‑Series engines
• Lightweight design at 1.99 lb for easy handling
• Painted exterior finish for corrosion protection and clean look

FAQ

What engine families are compatible with this valve?

The valve is designed for GM LS‑Series engines, covering a range of performance and street applications.

Is the valve suitable for high‑performance or racing use?

Yes, its steel construction and precise threading make it ideal for both street performance upgrades and track‑day demands.

How does the threaded inlet differ from other connection types?

The threaded inlet provides a secure, leak‑free seal that resists vibration, ensuring consistent exhaust flow.

Can I install this valve myself?

With basic hand tools and the provided specifications, experienced DIYers can install the valve, but professional installation is recommended for optimal results.

What warranty does Manley offer on this product?

Manley provides a standard limited warranty covering manufacturing defects, reflecting their confidence in product quality.