Login
LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Pair
LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Pair
LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Pair
 Next

LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Pair

Marsoni M251S
Sale price$1572.50
Pay 4 payments of $393.12 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - PairWe took the Factory Mast LS3 and CNC ported it for even more improvement. Our Factory Mast Cylinder Head starts out with our "as cast" port which we now offer a CNC port for more airflow. This allows for an additional option and price point over our As Cast Port version and our Premium Black Label LS3. ***Download your Cylinder Head Technical Sheet here*** We launched our Factory Mast product line to deliver an economical product line for our
Easy Shipping

Quick Dispatch:

Your LS3 Medium Bore | Factory Mast | CNC Ported | 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 | CNC Ported | Cylinder Head - Pair ships.

Need Help?
Questions about LS3 Medium Bore | Factory Mast | CNC Ported | 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 | CNC Ported | 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
4.1 ★★★★★
Based on 2436 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
machon e.
Whiting, US
★★★★★ 5
Almost indestructible
Color: Mixed Blue
So far my toy destroying pup hasn't destroyed this one. He tears Kong toys up in hours. Does it look pretty no lol ita been buried and thrown and chewed for months.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
B
Verified Purchase
Bob Hammett
Houston, US
★★★★★ 1
Not for aggressive chewers
Color: Mixed Blue
I purchased 2. The Rubber in the middle was chewed through in an hour by american bullys. Not for aggressive chewers. They are not interested in them anymore.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 6, 2026
D
Verified Purchase
Dave A.
Lowell, US
★★★★★ 3
Harder and heavier than a dog toy should be, but it is sturdy.
Color: Mixed Blue
The outer rim is a very hard plastic, hard enough to dent and ding furniture. Too hard to throw in the house. Dog likes it but has difficulty getting his mouth around the sides as the item is very heavy for its size. Squeaker in the middle was a a nice surprise. Would not buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
V
Verified Purchase
Vicky Courtright
Natrona Heights, US
★★★★★ 4
Durable and well made.
Color: Mixed Blue
Our dog will chew any toy up in 2.5 seconds. This has lasted for quite some time. It's super hard which can be a downfall because they lose interest. Squeeker is hard to push down but overall it's outlasted other toys.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 27, 2026
S
Verified Purchase
shelly
Boise, US
★★★★★ 5
Dog toy
Color: Mixed Blue
Glad I bought this. My dog job is to destroy her toys or she thinks so. This is great for her chewing and catching while it will be sometime before she destroys this one
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026

recommand products

Rear Leaf Spings | 4
Rear Leaf Spings | 4" Lift | Pair | Ford Bronco/F-150 4WD (1980-1996)
249.97
 LED Light Kit | Ditch Mount | 2
LED Light Kit | Ditch Mount | 2" Spectrum Pair | Spot | Chevy Silverado 1500 (19-26)
169.95
 Rear Leaf Springs | Military Wrap | 4
Rear Leaf Springs | Military Wrap | 4" Lift| Pair | Jeep Wrangler YJ (87-95)
164.97
 LED Light Kit | Bumper Mount | 20
LED Light Kit | Bumper Mount | 20" Spectrum Dual Row | Ford F-250/F-350 Super Duty (05-07)
134.97
 Rear Leaf Springs | 6
Rear Leaf Springs | 6" Lift | Pair | Ford F-250/F-350 Super Duty 4WD (99-07)
274.98