Knock Sensor Grommets for LS1 Engines
Product Overview
Top Street Performance knock sensor grommets (MPN GK002) are application-specific sealing components engineered for Chevrolet small block V8 Gen III/IV LS-based engines. When servicing the valley cover or replacing knock sensors, these rubber grommets restore factory seal integrity and support consistent performance under thermal cycling during engine refreshes, leak repairs, and teardowns.
Key Specifications
| Brand | Top Street Performance |
| Manufacturer Part Number | GK002 |
| Product Type | Gasket / Grommet |
| Material | Rubber |
| Color | Brown |
| Quantity | Sold as a pair (2) |
Vehicle Compatibility
Fits 5.7 L / 346 in³ LS1 engines and is compatible with the following factory applications:
- Chevrolet Corvette (LS1)
- Chevrolet Camaro (LS1)
- Pontiac Firebird (LS1)
- Pontiac GTO (LS1)
Application & Installation Context
This kit contains two replacement grommets intended for direct swap during knock sensor or valley cover service. The rubber construction resists compression set and maintains sealing pressure across normal operating temperatures, making it a standard replacement component for LS1 engine maintenance and full rebuilds.
Key Features
- Fits GM LS1 engines (Gen III/IV Small Block V8) for direct replacement at the knock sensor mounting location.
- Sold as a pair, supplying the exact quantity needed to replace grommets on both sensors during valley cover service.
- Constructed from rubber to provide consistent sealing performance around the knock sensor interface.
- Restores proper fit and seal when reinstalling the knock sensor or valley cover, supporting reliable engine refresh work.
- Identifiable by MPN GK002 from Top Street Performance, ensuring accurate cross-reference for LS-based platform rebuilds.
Frequently Asked Questions
Which engines are these knock sensor grommets compatible with?
These grommets fit the Chevrolet Small Block V8 Gen III/IV LS-based family, specifically 5.7L / 346 cu in. LS1 engines. They are designed for LS1 applications found in the Chevrolet Corvette, Camaro, Pontiac Firebird, and GTO.
What material and finish do these grommets use?
Top Street Performance constructs these knock sensor grommets from durable rubber with a brown finish. The color is selected to match the intended mounting surface and component layout on your LS1 engine.
When should I install new knock sensor grommets?
Replace these grommets whenever you are removing the valley cover or the knock sensors themselves. They provide a superior seal and strength, making them essential for leak repair, engine refresh work, performance rebuilds, and component replacement on LS1 platforms.
How many grommets are included in this listing?
This listing sells these knock sensor grommets as a pair. You receive two rubber grommets to complete your replacement task, which supports consistent sealing performance during valley cover or knock sensor service on LS1 engines.
Are these an upgrade over the original equipment parts?
Yes. These grommets are engineered by Top Street Performance with rubber construction focused on delivering superior strength and a reliable seal around the knock sensor mounting points. They serve as application-specific sealing components for Chevrolet LS1 engines.
Built for Enthusiasts, Backed by TSP
Quality
Engineered for exceptional quality and unbeatable value. Every TSP product is backed by a one-year warranty for reliability and confidence.
Performance
Designed for high-performance applications — improved ignition, torque, and power, at prices that meet the demands of serious builders.
Service
Exceptional customer support and a seamless experience — our team helps with product selection, technical questions, and order inquiries.
Shipping Information
Shipping & Payment
- Orders are processed and shipped within 1–2 business days after payment is received.
- We do not ship to P.O. Boxes or APO/FPO addresses (if applicable).
- Additional shipping fees may apply to Alaska, Hawaii, and U.S. Territories.
- If your package is delayed or lost, please contact us and we will assist in locating or replacing your order.
Payment
Immediate payment is required for all "Buy It Now" purchases or when checking out in the shopping cart. If you have any questions regarding payment, feel free to contact us. Thank you for shopping with us on eBay!
Returns
We strive to provide high-quality products and excellent customer service. If you receive an item that is damaged, defective, or does not meet your expectations, please contact us immediately — our team is committed to resolving any issue as quickly as possible.
Return Eligibility
- Returns are accepted within 30 days from the date of delivery.
- Items must be in their original condition and include all original packaging and accessories.
- Damaged or defective items: if your item arrives damaged or has any issue, reach out to us and we will arrange a replacement or refund at no additional cost.
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