GSC P-D Subaru EZ30 PHZ 1 Exhaust Valve Guide Stopper Style OVERSIZE +.001 - Single

GSC P-D Subaru EZ30 PHZ 1 Exhaust Valve Guide Stopper Style OVERSIZE +.001 - Single

Marsoni

M251S

$20.85

Get it in 3 business days with 1 day shipping. Friday, May 29

GSC P-D Subaru EZ30 PHZ 1 Exhaust Valve Guide Stopper Style OVERSIZE +.001 - SingleGSC P D Subaru EZ30 PHZ 1 Exhaust Valve Guide Stopper Style OVERSIZE +. 001 Single

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The looks are very nice, functional if left alone once assembled. After that I would leave them alone otherwise you risk the main male portion just coming loose of the housing, sound quality is decent, nothing to write home about, but again, not very durable. If they could fix that 1 thing, these would be very good buy and value, the rest of each plug is hefty and well made.

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Reviewed in the United States on January 12, 2026

Verified Purchase

Amazon Customer

Lexington, US

★★★★★ 5

Fixed my over temp warning issue.

Easy to change and work like new. No more over temp warning at idle.

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Reviewed in the United States on June 9, 2025

Verified Purchase

Michael Rhodes