CSF Dual Pass Transmission Oil Cooler - BMW E9x M3

CSF Dual Pass Transmission Oil Cooler - BMW E9x M3

Marsoni

M251S

$224.50

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

CSF Dual Pass Transmission Oil Cooler - BMW E9x M3Made with CSFs AC condenser technology using a 1 row super high pressure 22mm wide 11 channel microtube Dual pass high performance core with 11 cooling tubes vs. OEM 10 tube design. High density multi louvered fin design with 20% more surface area contact compared to OEM unit. Drop in fit requiring no modifications to install. Accepts all attaching OEM components including oil line connections, mounting brackets, and shroud ducting Lab tested at ~30%

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Arrived quickly. No factory odor. Was "scrunchy" out of the package, but fit snuggly around the twin mattress and doesn't make any annoying noise. Basic protective mattress topper. Water proof, but breathable, no condensation under the sheets. Disappointed there wasn't more "fluff", but does the job of protecting my mattress from coffee spills and natural body sweat in between weekly washing. I've had it a while, and it seems to be holding up with monthly washing and drying.

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Reviewed in the United States on April 23, 2026

Verified Purchase

STEPHANIE CATANZARO

Chelsea, US

★★★★★ 5

Mattress pad

Size: Queen

This mattress pad is comfortable it makes a difference when it on the mattress. It’s makes the bed feel softer instead of hard.

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Reviewed in the United States on May 27, 2026

Verified Purchase

H. E. Penner

Louisville, US

★★★★★ 5

So far, impressed

Size: California King

Probably not as high a quality as more expensive ones, but fits a California King bed with deep sides perfectly. I am a care-giver for an elderly male and have ordered several because the price is good and I can change them frequently if "accidents" happen. The Mattress Topper Pad does need a large-capacity washer.

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Reviewed in the United States on March 18, 2026