Description
Protect Your LS Engine from Unfiltered Oil Contamination
The iFJF LS Billet Oil Bypass Check Valve Plug is a critical upgrade for LS-series engine builders. The factory oil bypass check valve can allow unfiltered oil to reach bearings, lifters, and camshafts — causing premature wear. Our billet aluminum plug permanently seals this pathway, ensuring 100% filtered oil to your engine internals.
Key Features
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Billet 6061-T6 Aluminum — CNC-machined from aircraft-grade aluminum for maximum durability and corrosion resistance
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Complete Bypass Elimination — Permanently seals the bypass port, preventing unfiltered oil from circumventing the filter under high-pressure conditions
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Threaded Removal Port — Built-in extraction hole for easy removal during engine teardowns
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Universal LS Compatibility — Fits all Gen III (1997-2007) and Gen IV (2005-2017) LS-based engines
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No Modification Required — Drop-in installation with basic hand tools
Compatibility
| Engine |
Displacement |
Vehicle Examples |
| LS1 |
5.7L |
1997-2004 Corvette, 1998-2002 Camaro/Firebird |
| LS2 |
6.0L |
2005-2007 Corvette, GTO, CTS-V |
| LS3/LS6 |
6.2L/5.7L |
2008-2013 Corvette, 2001-2004 Z06 |
| LS7 |
7.0L |
2006-2013 Corvette Z06, Camaro Z/28 |
| LS9/LSA |
6.2L SC |
2009-2013 ZR1, 2009-2015 CTS-V |
| LQ4/LQ9 |
6.0L |
1999-2007 Silverado/Sierra HD |
| LM7/LR4 |
4.8L/5.3L |
1999-2007 Silverado/Tahoe/Suburban |
Installation Steps
- Drain engine oil and remove oil filter
- Locate bypass valve near oil filter housing
- Remove factory bypass valve
- Clean mating surface thoroughly
- Install iFJF billet plug — torque to 18-22 ft-lbs
- Reinstall filter, refill oil, check for leaks
Frequently Asked Questions
Q: Will this increase oil pressure?
A: No. The plug seals the bypass pathway, forcing all oil through the filter. Oil pressure remains unchanged.
Q: Is this safe for daily driving?
A: Yes, as long as you maintain regular oil changes (3,000-5,000 miles). This is standard practice in performance engine building.
Q: Does this fit all LS engines?
A: Yes — all Gen III and Gen IV LS-based engines: LS1, LS2, LS3, LS6, LS7, LS9, LQ4, LQ9, LM7, LR4, LM4, L33, L76, L92, L99.
Q: Can I remove it later?
A: Yes, the threaded removal port allows easy extraction during engine disassembly.
Q: Does this work for forced induction builds?
A: Yes. Billet 6061-T6 aluminum handles all power levels including 1000+ HP turbo/supercharged setups.
Q: What tools do I need?
A: Basic hand tools and a torque wrench. No special tools required.
