Shopping Cart -

Your cart is currently empty.
Upgrade to today
for only an extra Cxx.xx

You get:

plus This issue of xxxxxxxxxxx.
plus Instant access to the latest issue of 420+ of our top selling titles.
plus Unlimited access to 34000+ back issues
plus No contract or commitment. If you decide that PocketmagsPlus is not for you, you can cancel your monthly subscription online at any time. Auto-renews at $16.99 per month, unless cancelled.
Upgrade for $1.39
Then just $16.99 / month. Cancel anytime.
Learn more
Pocketmags Digital Magazines
Pocketmags Digital Magazines
   You are currently viewing the Canada version of the site.
Would you like to switch to your local site?
Read anywhere Read anywhere
Ways to pay Pocketmags Payment Types
Trusted site
At Pocketmags you get
Secure Billing
Great Offers
Web & App Reader
Gifting Options
Loyalty Points


Just like any short-block build, your cylinder head is only as good as the machine shop that put it together. Proper inspection, precision machining via state-of-the-art equipment, a good valve job, and the company’s track-record in the industry all factor into the deal—especially if you’re chasing four-digit horsepower. For ’03-present Cummins owners looking to go big, there is a lot more to it than simply adding head studs. The factory, crack-prone valve seats need to be addressed before they become a major problem, stiffer valve springs need to be added to handle elevated rpm, drive pressure, and boost, and fire rings are requisite for utmost combustion sealing.

Based on the head work it was regularly performing for its truck pull and drag race customers, the folks at Freedom Racing Engines—the engine building wing of Fleece Performance Engineering—decided to offer a competitionready cylinder head for 24-valve Cummins owners. Called its Performance head, each reconditioned unit comes loaded with some of the best components available in the aftermarket, along with its factory weak links addressed.

Purchase options below
Find the complete article and many more in this issue of Diesel World - Oct 2019
If you own the issue, Login to read the full article now.
View Issues

About Diesel World

Diesel World October 2019, Winter Takes All, 2019 : The Year Of Carnage, Vintage Refresh : Turning the Clock back on a 600 HP OBS Ford, And More....

Single Digital Issue Oct 2019
This issue and other back issues are not included in a new Diesel World subscription. Subscriptions include the latest regular issue and new issues released during your subscription.
Annual Digital Subscription $20.99 billed annually