BTR N/A Stage 2 Cam - LS3 Engines (225/238 .620/.605 113+3)

Transform your LS3 with the legendary Brian Tooley Racing N/A Stage 2 camshaft. With a proven history of making 470 whp when accompanied by proper bolt-ons, this cam delivers serious naturally aspirated performance while maintaining stock-like driving characteristics. The aggressive idle note and stock torque converter compatibility make this the perfect upgrade for G8 GT, 5th Gen Camaro, and C6 Corvette owners seeking maximum performance without sacrificing drivability.

Key Features:

• 225/238 duration (intake/exhaust) @ .050"
• .620/.605 lift (intake/exhaust)
• 113+3° LSA (Lobe Separation Angle)
• Designed specifically for LS3 naturally aspirated engines
• Proven 470 whp with proper bolt-ons
• Stock torque converter compatible (G8 GT, Camaro, Corvette)
• Aggressive idle note with excellent drivability
• Premium BTR quality and engineering

Performance Benefits:

• Proven Power: 470 whp with proper supporting modifications
• Stock Converter Compatible: Works perfectly with factory torque converters
• Aggressive Idle: Lopey idle note that sounds incredible
• Excellent Drivability: Stock-like driving characteristics for daily use
• Strong Power Band: Delivers power throughout RPM range
• LS3-Optimized: Designed specifically for LS3 rectangular port heads

Specifications:

• Brand: Brian Tooley Racing (BTR)
• Part Number: 32538133R1
• Product: N/A Stage 2 Camshaft
• Duration @ .050": 225.4° intake / 238.2° exhaust
• Valve Lift: .620" intake / .605" exhaust
• LSA: 113+3° (Lobe Separation Angle)
• Recommended RPM Range: 2,000 - 6,500+ RPM
• Valve Springs: Upgraded valve springs REQUIRED

Fitment Information:

• Compatible Engines:
• LS3 6.2L V8 (naturally aspirated)
• L99 6.2L V8 (naturally aspirated)
• Common Applications:
• 2008-2009 Pontiac G8 GT (LS3/L99)
• 2010-2015 Chevrolet Camaro SS (LS3/L99)
• 2008-2013 Chevrolet Corvette C6 (LS3)
• 2014-2019 Chevrolet SS (LS3)
• LS3 engine swaps in any chassis
• Note: Designed for LS3 rectangular port heads - not for cathedral port engines

What's Included:

• BTR N/A Stage 2 camshaft (32538133R1)
• Installation instructions

Required Supporting Modifications:

• REQUIRED:
• Upgraded valve springs (BTR or equivalent)
• Pushrods (stock may work, upgraded recommended)
• Gasket set for cam installation
• Professional tuning REQUIRED after installation
• HIGHLY RECOMMENDED for 470 whp:
• Long tube headers
• High-flow cat-back exhaust
• Cold air intake
• LS3 intake manifold (if not already equipped)
• Professional dyno tuning

Installation Notes:

• Professional installation STRONGLY recommended
• Requires engine disassembly to access camshaft
• Upgraded valve springs REQUIRED - stock springs will not work
• Degree camshaft for optimal performance
• Professional tuning REQUIRED after installation
• Stock torque converters work perfectly - no upgrade needed

225/238 Duration - Naturally Aspirated Performance:

The N/A Stage 2 features 225.4° intake and 238.2° exhaust duration measured at .050" lift. This duration is specifically optimized for naturally aspirated LS3 engines, providing excellent power throughout the RPM range while maintaining good low-end torque. The longer exhaust duration helps scavenge exhaust gases efficiently, improving power output at high RPM.

.620/.605 Lift - Maximum Airflow:

The .620" intake and .605" exhaust lift provide excellent airflow for serious naturally aspirated power gains. This aggressive lift requires upgraded valve springs but works perfectly with stock LS3 rectangular port heads. The increased lift allows the engine to breathe better at high RPM, contributing to the proven 470 whp capability.

113+3° LSA - Performance Optimized:

The 113+3° Lobe Separation Angle is optimized for naturally aspirated performance, providing a good balance of low-end torque, mid-range power, and top-end performance. This LSA creates an aggressive idle while maintaining enough vacuum for power brakes and reasonable fuel economy during cruising.

Proven 470 WHP Performance:

The N/A Stage 2 has a proven history of making 470 whp when accompanied by proper bolt-ons including:

• Long tube headers
• High-flow cat-back exhaust
• Cold air intake
• Professional dyno tuning

This proven power level makes the Stage 2 one of the most popular LS3 camshafts on the market.

Stock Torque Converter Compatible:

One of the biggest advantages of the N/A Stage 2 is its compatibility with stock torque converters in G8 GT, 5th Gen Camaro, and C6 Corvette applications. This saves you the cost and hassle of upgrading the torque converter while still delivering excellent performance and drivability. The cam's characteristics work perfectly with the factory converter's stall speed.

N/A Stage 2 - What to Expect:

• Idle: Aggressive lopey idle - very noticeable and sounds incredible
• Low-End: Good low-end torque - better than most aggressive cams
• Mid-Range: Strong power delivery throughout mid-range
• Top-End: Pulls hard to 6,500+ RPM
• Sound: Aggressive exhaust note with lopey idle
• Drivability: Stock-like driving characteristics - excellent for daily use

Upgraded Valve Springs REQUIRED:

CRITICAL: This camshaft REQUIRES upgraded valve springs. The stock valve springs are not designed for the aggressive lift and duration of the N/A Stage 2 and will cause valve float, poor performance, and potential engine damage. BTR valve springs or equivalent are required for safe, reliable operation.

Professional Tuning REQUIRED:

CRITICAL: This camshaft requires professional tuning after installation. The aggressive cam profile changes the engine's airflow characteristics significantly, requiring custom fuel and ignition maps for optimal performance, reliability, and drivability. Professional dyno tuning is highly recommended to achieve the proven 470 whp power level.

Why Brian Tooley Racing?

Brian Tooley Racing (BTR) has been a leader in LS engine performance for over 15 years. The N/A Stage 2 is one of their most popular camshafts, with thousands of satisfied customers running this grind in their LS3 engines. BTR's proven track record and extensive testing ensure you're getting a camshaft that delivers on its promises.

Installation Tips:

• Have a professional install the camshaft
• Degree the camshaft for optimal performance
• Install upgraded valve springs (REQUIRED)
• Check piston-to-valve clearance
• Replace timing chain and components while engine is apart
• Have ECU professionally tuned after installation
• Stock torque converter works perfectly - no upgrade needed

Perfect For:

• G8 GT, 5th Gen Camaro SS, C6 Corvette owners seeking maximum N/A power
• LS3 builds targeting 470+ whp naturally aspirated
• Daily drivers wanting aggressive sound with excellent drivability
• Street/strip builds requiring proven performance
• Anyone seeking BTR's most popular LS3 camshaft

Perfect For: LS3 owners seeking proven 470 whp naturally aspirated performance with BTR's legendary N/A Stage 2 cam featuring stock converter compatibility and aggressive idle.

Pro Tip: Stock torque converters work perfectly with this cam - no need to upgrade for G8 GT, Camaro SS, or C6 Corvette applications.

REQUIRED: Upgraded valve springs and professional tuning are mandatory. Proper bolt-ons needed for 470 whp.

Transform your LS3 with BTR N/A Stage 2 - 225/238 duration, .620/.605 lift, 113+3 LSA, proven 470 whp, stock converter compatible, aggressive idle.