Description
⚠️ FOR OFF-ROAD USE ONLY. This product is intended for off-road, racing, and competition vehicles not registered for highway use. Check your local, state, and federal regulations before purchase and installation. Not legal for sale or use on emission-controlled vehicles operated on public roads.
EGR Block Off Delete Kit for L98 305 TPI Camaro & Firebird
The iFJF ER-0123 EGR Block Off Delete Kit provides a simple, effective solution for 1987-1992 Chevrolet Camaro and Pontiac Firebird owners struggling with EGR system issues on their L98 305 Tuned Port Injection engines. The L98's TPI intake manifold is notorious for EGR passage carbon clogging, which leads to rough idle, hesitation, stalling, and poor overall drivability. This block off plate kit allows you to permanently eliminate the problematic EGR system, clean up the engine bay, and restore smooth engine operation.
The L98 TPI EGR Problem
The Tuned Port Injection system on the L98 305 was revolutionary for its time, but its long intake runners and complex EGR routing created a perfect environment for carbon buildup. Exhaust gases carrying carbon particles pass through internal EGR passages in the intake manifold base. Over 30+ years of operation, these passages become completely blocked with hardened carbon deposits. When the EGR passages clog, the EGR valve either fails to open properly (triggering insufficient flow codes) or sticks partially open (causing constant exhaust gas dilution and rough running). The ER-0123 block off kit eliminates the EGR valve and seals the intake manifold port, resolving all carbon-related EGR issues at the source.
Vehicle Compatibility
| Make |
Model |
Years |
Engine |
| Chevrolet |
Camaro (IROC-Z, Z28, RS) |
1987-1992 |
L98 305 CID (5.0L) TPI |
| Pontiac |
Firebird (Trans Am, Formula, GTA) |
1987-1992 |
L98 305 CID (5.0L) TPI |
Technical Specifications
| Specification |
Detail |
| Plate Material |
Heavy Gauge Steel |
| Plate Finish |
Zinc Plated (Corrosion Resistant) |
| Gasket Material |
High-Temperature Fiber Composite |
| Hardware |
Grade 8.8 Steel Bolts |
| Application |
L98 305 TPI Intake Manifold EGR Port |
| SKU |
ER-0123 |
Frequently Asked Questions
Q: Will this fit my 1987-1992 Camaro or Firebird with the L98 305 TPI engine?
A: Yes, this EGR block off delete kit is specifically designed for the 1987-1992 Chevrolet Camaro and Pontiac Firebird equipped with the L98 305 CID (5.0L) Tuned Port Injection engine. It fits IROC-Z, Z28, Trans Am, Formula, GTA, and base models with this specific engine.
Q: What does this kit include?
A: The ER-0123 kit includes a precision-cut steel block off plate, high-temperature gasket, and all necessary mounting hardware for a complete installation.
Q: Will this cause a check engine light?
A: On pre-OBDII vehicles (1987-1992), removing the EGR system may trigger a Service Engine Soon light depending on your specific ECU calibration. Some owners report no light, while others may need a custom ECU tune or PROM chip to suppress the EGR diagnostic routine.
Q: Why remove the EGR system on an L98?
A: The EGR passages in the L98 TPI intake manifold are prone to severe carbon clogging after years of use. This causes rough idle, hesitation, and poor performance. Removing and blocking the EGR eliminates these issues and simplifies the engine bay.
Q: How long does installation take?
A: Installation typically takes 20-30 minutes. The EGR valve is easily accessible on the passenger side of the TPI intake manifold. Basic hand tools are all that's required - a socket set, wrench set, and possibly penetrating oil for stubborn bolts.
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FOR OFF-ROAD USE ONLY. Not legal for use on emission-controlled motor vehicles operated on public highways.
