X-Series Single to Dual Stage Conversion Kit (35-50-75-100-150-200 HP)

X-Series Single to Dual Stage Conversion Kit (35-50-75-100-150-200 HP)

Marsoni

M251S

$241.50

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

X-Series Single to Dual Stage Conversion Kit (35-50-75-100-150-200 HP)Single to Dual Stage Conversion Simple, Clean Install 200 HP Solenoids E85 Compatible With Different Jetting Includes Jetting For 35 50 75 100 150 200HP X Series: X Series systems are made from the same high quality parts and materials as Nitrous Outlet systems, but feature slightly smaller solenoids that are capable of flowing up to 200 HP. All Nitrous Outlet parts and accessories are compatible with X Series systems. Application: This kit includes

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I use Pennzoil Platinum Euro Full Synthetic 5W-40 in my Fiat 124 Spider, and it’s been great so far. The engine runs smooth and quiet, and cold starts feel solid. No issues with oil consumption, and it holds up well between changes. The 6-pack of 1-quart bottles is convenient and makes it easy to measure out exactly what I need. Overall, it’s a quality synthetic oil at a good value. I’ll keep using it in my 124 Spider.

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Reviewed in the United States on February 28, 2026

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SEA

Massapequa, US

★★★★★ 5

Ok for gas engines

Size: 1 Quart, Style: 1-Pack, Configuration: Euro 5W-40

Has latest API cert (SQ). Not with latest VW / Porsche / Mercedes diesel engine approvals.

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Reviewed in the United States on April 25, 2026

Verified Purchase