Description
Product Overview
Precision-engineered EGR block-off delete plug kit for 1985-1988 Chevy 305 TPI (5.0L) and 1987-1988 350 TPI (5.7L) engines in Camaro, Firebird, and C4 Corvette. These TPI engines are notorious for EGR passage clogging causing rough idle, hesitation, and hard hot starts. Our billet block-off plugs provide a permanent, leak-free solution. For off-road and competition use only.
Key Features
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TPI-Specific Design: CAD-engineered to exact 305/350 TPI EGR port dimensions — no universal adapters needed.
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Billet Construction: Machined from solid billet aluminum — vastly superior to thin stamped steel plates that warp under heat.
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Resolves Common TPI Issues: Eliminates EGR-related rough idle, part-throttle hesitation, and carbon-clogged intake passages.
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Complete Plug Kit: Includes EGR valve block-off plug, EGR tube plug, and required gaskets for complete system removal.
Compatibility
| Make |
Model |
Engine |
Year |
| Chevrolet |
Camaro, Corvette |
305 TPI (5.0L) |
1985-1988 |
| Chevrolet |
Camaro, Corvette |
350 TPI (5.7L) |
1987-1988 |
| Pontiac |
Firebird, Trans Am |
305/350 TPI |
1985-1988 |
Specifications
| Specification |
Detail |
| Material |
Billet Aluminum |
| Application |
305/350 TPI EGR Block-Off |
| Fitment |
1985-1988 Camaro/Firebird/Corvette |
| Usage |
Off-Road / Competition Only |
⚠️ Off-Road/Competition Use Only. Not CARB-compliant. Check local emissions regulations.
Frequently Asked Questions
Q: Will this fit my 1989 TPI engine?
A: This kit is for 1985-1988 TPI engines. 1989+ TPI uses a different EGR mounting pattern.
Q: Does installation require removing the intake manifold?
A: No. The EGR valve is externally mounted. Basic hand tools, approximately 45-60 minutes.
Q: Is an EGR simulator required?
A: Yes, removing EGR will trigger a CEL. An EGR simulator or custom PROM chip is recommended.
Q: What is your return policy?
A: 30-day return policy for unused items in original packaging. Contact us for replacement or refund.
Q: How fast is shipping?
A: Ships within 1-2 business days from US warehouse. Standard: 3-7 days.
Q: Do you offer warranty?
A: Yes, 1-year warranty against manufacturing defects.
Order with Confidence
Add to cart now — free shipping on orders $50+. Contact our support team within 24h for fitment questions.
