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Vertex Top End Rebuild Kit - WR450F 12,5:1 2003-06 (V-22915A) 94.93mm

Marsoni M251S
Sale price$221.28
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Vertex Top End Rebuild Kit - WR450F 12,5:1 2003-06 (V-22915A) 94.93mmVERTEX TOP END REBUILD KITS Piston Kit Vertex pistons have an outstanding reputation for quality and performance. Each gravity cast piston is created with only premium aluminium alloys utilizing a 12 21% silicon content. The silicon content in Vertex pistons is crucial to the quality of the piston. Silicon is critical in decreasing thermal expansion which, when an engine reaches normal operating temperatures, can change the geometry of the piston.
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4.8 ★★★★★
Based on 2135 reviews
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F
Verified Purchase
Frank Guerrero
New York, US
★★★★★ 5
Great product!
Color: Black
Use this under my hard hat to keep from sliding everywhere. I have bought several over the years and this have been my favorite so far. Will definitely buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
P
Verified Purchase
Placeholder
Dallas, US
★★★★★ 4
Good but if the elastic band were wider it would be great
Color: Black
This is a great under helmet or perspiration barrier for the face during heavy spinning workouts. Sadly to avoid an indentation to your forehead, you must wear it inside out because the sewing band is narrow and tight.
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Reviewed in the United States on March 3, 2026
C
Verified Purchase
Cassandra
Carnegie, US
★★★★★ 5
"Head" of the house gift...
Color: Black
Great fabric, nice fit..
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Reviewed in the United States on May 23, 2026
A
Verified Purchase
Amazon Customer
Natrona Heights, US
★★★★★ 1
Too damn small
Color: Black
Way too small for an adult. It doesn't even fit my 11 year old. Unfortunately I didn't open it immediately or I would have returned it. Now I'm stuck with something nobody in my house can use.
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Reviewed in the United States on April 16, 2026
O
Verified Purchase
OBG
New York, US
★★★★★ 3
One size definitely doesn’t fit. Otherwise Ok.
Color: Black
OSFM - one size fits most. It should be OSFS - one size fits small/some. Measured my head size and according to their chart I’m l/XL. This cap is tight fitting and gives you a headache after an hour. Otherwise it’s fine. Keeps your head cool, is absorbent and works well under a helmet.
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Reviewed in the United States on November 21, 2025

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