BTR Brian Tooley Racing Truck Norris NSR Camshaft No Springs Required for Gen 3/4 LS 4.8
- 1999-2013 Silverado and Sierra, Gen 3/4 LS
- 4.8, 5.3, 5.7, 6.0, 6.2, LS1, Vortec engines
- No springs required, cam only
- 11.33 pounds
- Package 22.2 x 3.8 x 2.9 inches
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A cam-only grind for late-generation LS truck engines that is designed to run without new valve springs. The listing gives no duration or lift figures.
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ASIN: B0BLTCSKSVCategory: Camshafts
Overview
Dropping a no-springs-required camshaft into an LS truck engine skips the valve spring swap that most cam changes call for. The NSR is sold as the cam alone, aimed at late-model Silverado and Sierra owners.
The NSR name is the pitch: a cam meant to work with the engine's existing valve springs, which saves money and time on the build. Specifications are missing, and cam-only means pushrods, seals and gaskets are your own errand.
Who it's for
LS truck owners who want a simple cam swap and are comfortable sourcing the supporting parts. Builders who must match heads, converter and gearing to published cam numbers need data this listing does not provide.
Pros and cons
- No new springs required
- Cam alone makes the purchase simple
- Covers many LS truck engines
- Maker's own truck cam line
- Cam only, no gasket or pushrods
- Duration and lift not listed
- Description gives no real figures
- Engine size list is only in the title
Performance notes
Matching the cam to the existing valve springs avoids valve float risk without a spring upgrade, but the lobe profile still decides where the engine makes power and how it idles. With no figures published, expected gains are the maker's claim only.
Specifications
| Brand | Brian Tooley Racing |
|---|---|
| Engines | Gen 3/4 LS 4.8 5.3 5.7 6.0 6.2 LS1 Vortec |
| Fits | 1999-2013 Silverado or Sierra |
| Included | Camshaft only |
| Package dimensions | 22.2 x 3.8 x 2.9 inches |
| Item weight | 11.33 pounds |
Frequently asked questions
Which LS engines does the Truck Norris NSR camshaft fit?
The title names Gen 3 and 4 LS truck engines, including the 4.8, 5.3, 5.7, 6.0, 6.2, LS1 and Vortec, in 1999-2013 trucks.
Does the NSR camshaft come with pushrods or gaskets?
No. The title says Cam Only.
What does No Springs Required mean?
The name indicates the cam is meant to work with the engine's existing valve springs. The listing gives no spring pressure data, so check with the seller.