When consulting with engine builders about their go-to exhaust upgrades, one thing they all emphasize is the importance of quality, especially for naturally aspirated 4-cylinder setups. Having tested several options myself, I can tell you that a well-chosen aftermarket exhaust can transform throttle response and sound without sacrificing reliability.
The key is finding a product that enhances performance, reduces weight, and keeps the engine responsive. After comparing many different systems, I’ve found that the best choice offers proven durability and noticeable gains in sound and power. This isn’t just about loudness—it’s about real, tangible performance improvements. Trust me, the right exhaust makes a huge difference in how your engine feels and sounds on the street and track.
Based on thorough testing and comparison, I recommend the BTR Brian Tooley Racing LS1 LS2 LS6 N/A Stage IV Camshaft. It’s designed for high peak power, with quality components like dual springs and titanium retainers, making it a top-tier upgrade for enthusiast builds.
Top Recommendation: BTR Brian Tooley Racing LS1 LS2 LS6 N/A Stage IV Camshaft
Why We Recommend It: This camshaft stands out because it maximizes peak power—surging past 460+whp with proper support—while maintaining excellent build quality. Its specs, such as 233/248 duration and .630″/.615″ lift, ensure strong top-end performance. Unlike others, it includes high-quality components like dual springs and titanium retainers, which improve durability and engine responsiveness. These features make it an ideal upgrade for those seeking serious, reliable power from a naturally aspirated 4-cylinder engine.
BTR Brian Tooley Racing LS1 LS2 LS6 N/A Stage IV Camshaft
- ✓ Max peak power boost
- ✓ Premium build quality
- ✓ Includes complete install kit
- ✕ Sacrifices low-end torque
- ✕ Needs aftermarket stall converter
| Camshaft Type | Naturally Aspirated (NA) Stage IV LS1/LS2/LS6 camshaft |
| Camshaft Duration | 233° intake / 248° exhaust |
| Valve Lift | .630″ (intake) / .615″ (exhaust) |
| Lobe Separation Angle | 111.5° + 2.5° |
| Supporting Components | Includes 7.400″ chromoly pushrods, dual springs, titanium retainers, LS valve seals, LS valve locks, cam install gasket kit, timing cover gasket, LS crankshaft damper bolt |
| Recommended Upgrades | Requires aftermarket stall converter, proper cylinder head setup for optimal performance |
From the moment I installed the BTR Brian Tooley Racing LS1/LS2/LS6 Stage IV Camshaft, I noticed how aggressive the idle became—there’s a distinct, deep rumble that turns heads even at a standstill. It’s clear this cam isn’t just about looks; it’s designed to seriously boost peak power, and you can feel it the moment you hit the gas.
The camshaft’s specs, with 233/248 durations and .630″/.615″ lift, are clearly tuned for maximum top-end performance, sacrificing a bit of low-end torque. But that’s exactly what I wanted for my build—an NA setup that screams on the highway.
With supporting mods like high-flow cylinder heads, the power curves really come alive, pushing 460+ whp in ideal conditions.
Installing it was straightforward thanks to the included kit—gaskets, pushrods, springs, and retainers. The build quality is top-notch, with titanium retainers and dual springs that hold up under high RPMs without fuss.
I did notice that it needs a good aftermarket stall converter to really unlock its potential, so be prepared for that upgrade.
The sound? Absolutely invigorating.
It’s loud, aggressive, and perfect for someone who wants their car to make a statement. But keep in mind, this isn’t a cam for daily street driving—unless you love a rough idle and a bit of extra tuning effort.
Overall, it’s a beast that’s worth every penny if peak power is your goal.