Pro Series Header Build Kits: Chevy 4.3L Vortec (4300)

This header build kit has everything you need to bring that Chevy Vortec 4300 V-6 custom header together. Designed to fit the 1985-2014 Chevy V-6 engines found in a variety of GM automotive and marine applications. Great for building that set of headers for your model LB1/LB4/LU2/L35/LF6/LU3 powered truck, car, or boat. Great for building that set of headers for your 6 cylinder powered truck or car. 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?

Included are:

• Flanges: 1 American made precision laser cut 3/8� thick header flange to fit the Chevy Vortec 4300 engines
• Port Size: 1 5/8" or 1 3/4"
• Flange Stubs: Included are (6) preformed flange stubs to help speed up the fabrication process. These stubs are formed to the exact flange port shape, and come in 1 5/8" or 1 3/4" primary tube size.
  
• Mandrel Bends: We supply (8) 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.
• 3 into 1 Collectors: From there we supply a pair of our super high flow 3 into 1 slip on merge collectors with 3 sets of collector tabs. We can also substitute the pair of 3-1 merge collectors, for one single 6 into 1 merge collector. 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 2 different collector options:
• Slip on merge collectors with a straight exit (Collector tabs included)
• Slip on merge collectors with a transitional exit (Collector tabs included)
• 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 � lbs. package of filler rod

Because of the wide variety of engine chassis configurations these HP numbers are for general reference only.