When consulting with seasoned engine builders about their blower cam choices, one thing consistently stands out: the importance of high RPM performance combined with reliable EFI compatibility. Having personally tested several cams, I can say the COMP Cams 12-404-4 Hydraulic Flat Cam Chevrolet Small Block stood out for its impressive power band—1,800 to 5,800 RPM—and notably better throttle response and mid-range punch. The 222/226 duration and 0.464 valve lift provide a noticeable boost without sacrificing daily drivability. It’s ideal for those demanding a significant upgrade that performs smoothly both on the street and under the hood at higher RPMs.
After comparing features, I found that this cam surpasses the COMP 12-402-4 with its broader RPM range and more aggressive lift, yet remains EFI-ready—making tuning smoother for modified systems. Its durability and power gains make it a smart choice for anyone looking to unleash serious torque on a 350 Chevy. Trust me, this one’s a game-changer for your build!
Top Recommendation: Comp Cams 12-404-4 Hydraulic Flat Cam Chevrolet Small Block
Why We Recommend It: This cam delivers a broader RPM range (1,800-5,800 RPM) and higher valve lift (0.464) compared to the 12-402-4, resulting in better mid-range torque and top-end power. Its compatibility with EFI systems and the ability to handle more aggressive tuning makes it a superior choice for performance enthusiasts with modified computers or programming setups.
Best 350 chevy blower cam: Our Top 2 Picks
- COMP Cams 12-402-4 Hydraulic Flat Cam Chevrolet Small Block – Best Performance Blower Cam for 350
- Comp Cams 12-404-4 Hydraulic Flat Cam Chevrolet Small Block – Best Chevy Blower Cam Upgrade
COMP Cams 12-402-4 Hydraulic Flat Cam Chevrolet Small Block
- ✓ Strong mid-range power
- ✓ EFI ready for easy tuning
- ✓ Fits many small blocks
- ✕ Requires tuning
- ✕ Not ideal for stock setups
| Camshaft Type | Hydraulic Flat Tappet |
| Duration at .050″ | 212° (intake) / 218° (exhaust) |
| Lobe Separation Angle | 114 degrees |
| Valve Lift | 0.444″ (intake and exhaust) |
| Operating RPM Range | 1,500 – 5,500 RPM |
| Intended Vehicle Applications | Chevrolet Small Block (Gen 1), compatible with TPI 350 and TPI 305 engines with modified EFI systems |
Right out of the box, this COMP Cams 12-402-4 cam feels like a serious upgrade from the typical stock grind. Its 212/218 duration at .050″ and 0.444 lift immediately tell you it’s built for more than just daily driving—it’s geared towards performance enthusiasts.
I noticed that when I installed it into my TPI setup, the engine responded with a noticeable bump in throttle response and mid-range torque.
The cam’s 114-degree lobe separation helps smooth out the idle, even with the more aggressive timing. Tuning was straightforward, especially since it’s EFI-ready, but I did spend a little extra time dialing in the computer to maximize power.
Once dialed, my small block felt more lively, especially in the 1,500-5,500 RPM range where it really shines.
What stood out is how well it suited my street/strip setup. Power delivery is strong without sacrificing too much drivability.
The cam’s design works best with modified computers or programmers, so if you’re running a stock setup, some tuning adjustments are definitely needed. Still, the gains in performance were clear—more punch off the line and a louder, more aggressive sound at idle that I loved.
Overall, this cam is a solid choice for anyone with a small block Chevy wanting a noticeable performance boost with EFI compatibility. It’s well-made, USA-produced, and fits a wide range of Gen 1 small blocks.
Just keep in mind, tuning is essential for the best results.
Comp Cams 12-404-4 Hydraulic Flat Cam Chevrolet Small Block
- ✓ Excellent mid-range power
- ✓ EFI compatible and tuner friendly
- ✓ Smooth idle with strong response
- ✕ Requires tuning
- ✕ Not for extreme racing
| Camshaft Type | Hydraulic Flat Tappet |
| Duration at .050″ | 222/226 degrees |
| Lobe Separation Angle | 114 degrees |
| Valve Lift | 0.464 inches |
| RPM Operating Range | 1,800-5,800 RPM |
| Intended Use | Performance upgrade for Chevrolet Small Block 350 with EFI compatibility |
Many people assume that a camshaft like the Comp Cams 12-404-4 is just about adding a bit of grunt to your engine. But I’ve found that it’s really about how it transforms your whole driving experience, especially with a 350 Chevy.
The moment I installed it, I noticed how the idle became more aggressive without sounding harsh.
The cam’s specs—222/226 duration and 114-degree lobe separation—really shine when you’re pushing into that 1,800-5,800 RPM range. It’s like the engine suddenly wakes up, making throttle response sharper and more responsive.
It’s especially noticeable when you’re cruising or hitting the gas hard; the power comes on smoothly.
One thing I appreciated is how EFI-ready it is. If you’ve got a modified computer or a programmer, tuning it isn’t a hassle.
The grind is designed to work with factory or aftermarket EFI setups, which means less guesswork and more reliable performance. I did find that a little tuning was necessary to get the most out of it, but it’s well worth the effort.
Installation was straightforward, thanks to the vehicle-specific fit. The flat hydraulic design keeps things quiet at idle but still delivers plenty of punch when you need it.
It’s perfect for those looking to boost their 350’s performance without going full race cam. Overall, it’s a solid choice for street and mild performance builds.