StaffAllpar HomeMore NewsCarsTrucksUpcomingRepairsTest drives

Meet the new Six-Packs

by David Zatz on

Back in 1969, Chrysler Corporation set up three two-barrel carburetors atop its 440 cubic inch engines. Dodge dubbed it the “Six-Pack,” while Plymouth uncharacteristically failed to have an imaginative name for it.

The original 440 Six-Packs put down 390 horsepower and 490 pound-feet of torque; after one year, and for one year, they were joined by the 340 Six-Pack, rated at 250 net horsepower and 325 pound-feet of torque.

So why has FCA US claimed a trademark for the word “Sixpack” (not the phrase “Six-Pack”? Steven St. Laurent, who noticed the filing, pointed out that nobody makes cars with carburetors.

Could it be used for Ram Duallies, with their six wheels? Not really — it’s a trademark application based on a name already in use; and it’s for engines and engine parts.


This brings us to the world of Mopar performance parts — where we find a new Six Pack crate engine, good for 470 horsepower and 490 pound-feet of torque. It’s a 410 stroker, based on a new 340 block with LA heads (part P5153527).

Buyers can also get a more moderate 340 Six-Pack crate engine, pushing out 330 horsepower (P5153526) and 330 pound-feet of torque. It also uses LA heads, and “will fit in most muscle cars.” Since 340 engines in “wreckers” are becoming quite rare, these additions to the Mopar kit should make ambitious slant six and 318 muscle car owners happy.

David Zatz founded Allpar in 1998 (based on a site he had begun in 1993-94), after years of writing reviews for retail trades. He has been quoted by the New York Times, the Daily Telegraph, the Detroit News, and USA Today. Before making Allpar a full-time career, he was a consultant in organizational psychology. You can reach him by using our contact form (much preferred) or by calling (313) 766-2304

Jeep K8
Jeep Grand Commander?

Here’s what the 2018 Wrangler JL will cost

Aussies go for Mopar squads

More Mopar Car
and Truck News

Some popular Allpar pages

Dodge Demon

2018 Wrangler JL

Staff details/contactsTerms of ServiceInformation is presented to the best of our knowledge. Plans change and sometimes mistakes are made. Decisions or purchases made based on this site's verbiage or images are done at the reader's own risk. Also see the Allpar News archives, 1997-2008 • Copyright © 2008-2017, Allpar LLC. All rights reserved. • Mopar, Dodge, Jeep, Chrysler, HEMI, and certain other names are trademarks of Fiat Chrysler Automobiles.