Skip to content

LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - Pair

Marsoni M251S
Sale price$1024.50
Pay 4 payments of $256.12 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - PairExpected Ship Date February 2025 >Download the Cylinder Head Spec Sheet< > Download the Dyno Report Here < Introducing the Factory Mast "As Cast" Port Cylinder Head. We launched our Factory Mast product line to deliver an economical product line for our customers. We completely engineered and manufactured our long standing best in class CNC port into an "As Cast" port. This new process saves a significant amount of time and manufacturing cost, which
Easy Shipping

Quick Dispatch:

Your LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - Pair orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - Pair ships.

Need Help?
Questions about LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - Pair, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for LS3 Medium Bore | Factory Mast | As Cast Port | Cylinder Head - Pair in your area.

Get Shipping Estimates

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 2059 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
P
Verified Purchase
Paul P.
Natrona Heights, US
★★★★★ 5
Perfect
Color: 20pcs
Excellent value and a perfect replacement for the OEM clips. Nice secure hold.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 22, 2025
G
Verified Purchase
Guillo
Chelsea, US
★★★★★ 5
Protección!
Exelente!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
J
Verified Purchase
Jesus suarez
Massapequa, US
★★★★★ 5
Recomendado
Si utilizas un 4.6L Stoker es obligatorio utilizar en cada cambio de aceite.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
E
Verified Purchase
Ed H.
San Leandro, US
★★★★★ 5
Hard to find.
Good stuff. Hard to find. It should extend my engine life.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
D
Verified Purchase
doug kowitz
Lexington, US
★★★★★ 4
Great product
Quick delivery.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026

recommand products