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
4.4 ★★★★★
Based on 637 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Alex Galicia
Alexandria, US
★★★★★ 5
Quality
Color: CA9683
Definitely a improvement from Oem, have it on both Fj and Tacoma, feels so much better driving
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 15, 2025
D
Verified Purchase
DAVID C. PALMER
Grantham, US
★★★★★ 5
It works
Color: CA9683
No complaints
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 4, 2025
P
Verified Purchase
PK
Omaha, US
★★★★★ 4
It filters air.
Color: CA9683
This apparently fits in a car to filter air to the car. I put it in mine. But I cannot see it. So IDK if is even still there?
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2023
J
Verified Purchase
Jim Condo
Alexandria, US
★★★★★ 5
Great purchase
Size: Accord 2018-22 1.5L Gas
Fit my 2018 Honda Accord as stated. Easy to install. Saved $50 doing it myself.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2026
C
Verified Purchase
cool
Natrona Heights, US
★★★★★ 5
Top quality
Size: Accord 2018-22 1.5L Gas
Perfect replacement
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2026

recommand products