Texas Speed Stage 1 Cathedral Stroker Camshaft

The Texas Speed Stage 1 Cathedral Stroker Camshaft is designed specifically for 383 cubic-inch and larger LS engines equipped with cathedral-port cylinder heads. Its 235/250 duration, .644"/.632" lift, and 110 LSA are matched to the increased displacement and airflow demands of larger naturally aspirated stroker combinations.

This cam is intended for performance-focused builds using aftermarket cylinder heads and intake manifolds. It delivers an aggressive idle and a strong mid-to-upper RPM powerband while serving as the most street-oriented option in the TSP Cathedral Stroker camshaft lineup.

Developed In-House by Texas Speed

Texas Speed camshafts are developed using an internal lobe-design process that allows our engineering team to match the cam profile to the intended engine size, cylinder-head airflow, valvetrain requirements, and operating range.

Camshaft and valvetrain behavior is evaluated using Spintron testing to help verify stability and control throughout the intended RPM range. This development process allows Texas Speed to create purpose-built camshafts rather than relying on generic lobe combinations.

Camshaft Specifications

Duration @ .050"	235° Intake / 250° Exhaust
Valve Lift	.644" Intake / .632" Exhaust
Lobe Separation Angle	110°
Intake Centerline	109°
Minimum Recommended Displacement	383 Cubic Inches
Cylinder-Head Type	Cathedral-Port LS
Recommended Combination	Aftermarket Cathedral-Port Cylinder Heads and Intake Manifold
Best Use	Naturally Aspirated Street and Street/Strip Stroker Builds

Performance & Driving Characteristics

Category	Details
Idle Quality	Aggressive Performance Idle
Powerband	Strong Midrange and Upper-RPM Performance
Street Use	Most Street-Oriented Camshaft in the Cathedral Stroker Lineup
Best Combination	383+ CI Naturally Aspirated Engines with Upgraded Cylinder Heads and Intake

Final power output and driving characteristics will vary based on displacement, compression ratio, cylinder-head airflow, intake manifold, exhaust system, tuning, gearing, converter selection, and overall vehicle configuration.

Compare the Cathedral Stroker Camshaft Lineup

The Texas Speed Cathedral Stroker lineup offers three camshaft options for 383 cubic-inch and larger naturally aspirated LS combinations. Each stage increases performance capability and overall aggressiveness.

Camshaft	Position in Lineup	View Cam
Stage 1 – 235/250	Most Street-Oriented Cathedral Stroker Cam	Current Camshaft
Stage 2	More Aggressive Street/Strip Performance	View Stage 2
Stage 3	Maximum-Performance Cathedral Stroker Cam	View Stage 3

Fitment

GM Gen III and Gen IV LS-based engines
Cathedral-port cylinder heads
383 cubic-inch and larger stroker combinations
Naturally aspirated performance applications

Fitment & Important Notes

This camshaft is designed for 383 cubic-inch and larger LS stroker combinations and is not intended as a general replacement cam for stock-displacement engines.
Aftermarket cathedral-port cylinder heads and an upgraded intake manifold are strongly recommended.
Upgraded valve springs and supporting valvetrain components are required for the .644"/.632" lift and aggressive lobe design.
Custom tuning is required.
Converter, gearing, compression ratio, and valvetrain recommendations will depend on the complete engine and vehicle combination.
Always verify piston-to-valve clearance, valve spring installed height, coil-bind clearance, retainer-to-seal clearance, pushrod length, and overall valvetrain geometry during installation.