Speedway Motors

#28975310

Forged 5150 LS Turbocharged Camshaft

Fits GM Gen III and IV LS engines
Composed of 5150 Induction Hardened Chromium
Sold as Each

Power Level:

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$279.99

/each

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Product Summary

Fits GM Gen III and IV LS engines
Composed of 5150 Induction Hardened Chromium
Sold as Each

See more details

Key Specs

MFG. Part #	Select Power Level
Brand	Speedway Motors
Intake Duration (.050" Lift)	Select Power Level
Exhaust Duration (.050" Lift)	Select Power Level
Lobe Separation	Select Power Level

See more specs

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Details

The 28975310 Forged 5150 LS Turbocharged Camshaft is a boosted-focused camshaft option for GM Gen III and Gen IV LS engines, offered in Stage 1, Stage 2, or Stage 3 profiles to match your power goals. Built from 5150 induction-hardened chromium (a material commonly used in OEM applications), it’s designed to be a durable, high-performance upgrade that supports turbocharged LS combinations without blowing the budget.

Each stage increases duration and (in Stage 3) lift to push airflow and power potential further, with lobe separation moving wider as the stages step up—helpful for managing boosted power characteristics. All stages use a 3-bolt cam gear attachment and call for 0.660 valve springs. As with any cam swap—especially on boosted builds—piston-to-valve clearance should be verified during assembly.

Fits GM Gen III and IV LS engines
Composed of 5150 Induction Hardened Chromium
Sold as Each

Application

Designed to fit GM Gen III and IV LS engines.

Specs

Stage 1 Specs:

Intake Duration: 218 @ 0.50 in. lift
Exhaust Duration: 227 @ 0.50 in. lift
Intake Valve Lift: 0.600 in. with OE rocker arm ratio
Exhaust Valve Lift: 0.600 in. with OE rocker arm ratio
Valve Springs Needed: 0.660 Spring
Lift Separation: 112 Degrees
Camshaft Gear Attachment: 3-bolt
Alloy: 5150 Induction Hardened Chromium

Stage 2 Specs:

Intake Duration: 226 @ 0.50 in. lift
Exhaust Duration: 230 @ 0.50 in. lift
Intake Valve Lift: 0.600 in. with OE rocker arm ratio
Exhaust Valve Lift: 0.575 in. with OE rocker arm ratio
Valve Springs Needed: 0.660 Spring
Lift Separation: 113 Degrees
Camshaft Gear Attachment: 3-bolt
Alloy: 5150 Induction Hardened Chromium

Stage 3 Specs:

Intake Duration: 242 @ 0.50 in. lift
Exhaust Duration: 248 @ 0.50 in. lift
Intake Valve Lift: 0.625 in. with OE rocker arm ratio
Exhaust Valve Lift: 0.605 in. with OE rocker arm ratio
Valve Springs Needed: 0.660 Spring
Lift Separation: 116 Degrees
Camshaft Gear Attachment: 3-bolt
Alloy: 5150 Induction Hardened Chromium

CA Prop 65

Specifications

KEY SPECS
MFG. Part #	Select Power Level to see
Brand	Speedway Motors
Intake Duration (.050" Lift)	Select Power Level to see
Exhaust Duration (.050" Lift)	Select Power Level to see
Lobe Separation	Select Power Level to see

GENERAL
Gear Attachment	3-Bolt
Intake Valve Lift w/ Rocker Arm Ratio	Select Power Level to see
Exhaust Valve Lift w/ Rocker Arm Ratio	Select Power Level to see
Sold in Quantity	Each
Valve Springs Required
Timing Chain and Gears Included	No
Notes	.660 Valve Springs needed.

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