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O2
MOPAR 273-360 ci V-8 "LA Engine" Custom Header Build Kit

Small Block Mopar 273-360 "LA Engine" Custom Header Build Kit

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Product Code: RM-4510-NA-HBK
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Pro Series Header Build Kits: Small Block Mopar 273-360 ci "LA Engine"

This header build kit has everything you need to bring that old-school Chrysler LA V-8 custom header together. Found in a wide assortment of Chrysler, Dodge, Plymouth, and Ghia vehicles, our header kit is designed to fit your MOPAR 273-360 ci V-8 for a variety of racing applications. See why Stainless Headers Mfg., Inc has the most complete header builder kit on the market. (HP recommendations at the bottom of this page)

What makes our header build kits the choice of top fabricators?
  • Flanges* – Included are 2 American made precision laser cut 3/8” thick header flanges.
  • Flange Stubs – Included with our Mopar LA header kit are (8) formed stubs to help speed up your fabrication process. These flange stubs are formed to the exact flange shape and come in 1 5/8” or 1 3/4" primary tube sizes.**
  • Mandrel Bends - We supply (12) 180 degree J bends. Our J bends come with a 6” & a 12” leg. For most header builds, this extra leg length mean you won’t need to buy any straight tubing. What makes our stainless mandrel bends truly a unique product? We start off with an American made 304 stainless raw material, that is then bent in the U.S. for a genuine 304 .065 stainless bend. Our material forms better, welds better and last because it is a genuine 304 stainless.
  • 4 Into 1 Collectors - From there we supply a precision formed 4 into 1 collector or a set of our optional super high flow slip on merge collectors with 4 sets of collector tabs. Just like our stainless bends, we start off with an American made 304 stainless and fabricate the industries finest collectors.
We offer these header kits with 3 different collector options
Formed weld on collectors
(Collector stars included)

Slip on merge collectors
with a straight exit
Slip on Merge Collectors with Collector Tabs
Slip on merge collectors
with a transitional exit
Transitional Exit Slip on Merge Collectors with Collector Tabs
6 Part Video Series:
How To Build Your Own Headers



  • Collector stars – A simple part that really helps speed up the fab process. Used as a weld in block off between the 4 tubes before welding the collector on, there are precision laser cut for a perfect fit between your specific primary tubes.
  • Purge Caps – This simple, but effective method for back purging caps works great. Each kit includes 4 primary caps and one collector cap.
  • O2 bungs – Each header builder kit includes 2 weld on O2 bungs. Precision machined in the U.S. from 304 stainless billet, these bungs weld beautifully, not like a cast bung
  • Tig Filler Rod -Includes ¼ lbs. package of filler rod
Be sure to check out our Facebook, Instagram, and YouTube channels for continuous updates on customer projects, as well as how-to videos and information about our extensive product lineup.

*Flanges also compatible with Brodix Small block Chrysler B1BA series heads.
But WILL NOT function with the B1BA-MC Brodix head
Because of the wide variety of engine chassis configurations these HP numbers are for general reference only.


1 5/8” Primary Tube Header Kit: 300-400 Horse Power

1 3/4" Primary Tube Header Kit: 375-475 Horse Power


Add A Transitional Merge Collector For That Extra Performance Edge


Reference Number: #54510/#54510A

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