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SHELBY G.T.350SR
The minute you get in, turn the key, and get into gear, you know you’re in a living, fire-breathing machine, and it’s beyond doubt one of the most exciting and easiest-driving cars that I ever handled,” said Carroll Shelby in his 1965 book “The Cobra Story.”

PHANTOM GSX
Back in the early ’70s, a young car nut by the name of Terry Stinehelfer picked up a ’62 Skylark to terrorize the town in, though truth be known it wasn’t much. The $200 car was all that Terry needed, however; it was powered by a small 215 V-8, and after a few months of work Terry had a cool ride. He drove it around for about a month and had a blast, until one day some poor soul felt he needed the Buick a whole lot more than Terry did, and it was gone. While at the local shopping center in Columbus, the car was stolen and was never recovered. Terry thought it would be nice if someday he could own another.

GSS SUPERCHARGED DEMON
Grand Spaulding Dodge in Chicago became known as the world headquarters for great deals on new Dodge performance cars. This dealership fully dyno-tuned the performance cars it sold and often equipped them, as requested by the customer, with headers, bigger carburetion and other go-fast engine modifications—all right from the dealer.
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PRODUCT SPOTLIGHT: Big Block Chevy Round Port Custom Header Build Kit by Stainless Headers MFG. INC.
The Ultimate Custom Header Build Kit for Your Big Block Chevy
Author
The Auto Builder Staff
Photos Courtesy of Stainless Headers MFG. INC.
If you live for pulling trucks, racing, or high-performance applications, this build kit has everything you need to bring your vision to life. It’s designed to fit the standard bore space of big block Chevy heads, making it versatile enough for a variety of builds.
Unparalleled Precision and Quality
What sets this header build kit apart from the rest? It’s all about the details:
- Flanges: The kit includes two American-made, precision laser-cut 3/8″ thick header flanges specifically designed for Big Block Chevy heads. You can also opt for eight single port flanges for easier fabrication and installation.
- Full Bank Port Size Options: Choose from 2″, 2 1/8″, 2 1/4″, 2 3/8″, or 2 1/2″. Single port flange options are available in 2 1/4″, 2 3/8″, or 2 1/2″.
- Mandrel Bends: You get twelve 180-degree J bends with 6″ and 12″ legs. These extra-long legs mean you won’t need to buy additional straight tubing. The bends are crafted from American-made 304 stainless steel, which forms better, welds better, and lasts longer.
- 4 into 1 Collectors: The kit offers precision-formed 4 into 1 collectors or optional super high-flow slip-on merge collectors with four sets of collector tabs. Like the bends, these collectors are made from top-quality American-made 304 stainless steel.
- Collector Stars: These laser-cut stars simplify the fabrication process, acting as a weld-in block between the tubes before attaching the collector.
- Purge Caps: Back purging is a breeze with these caps. Each kit includes four primary caps and one collector cap.
- O2 Bungs: Two precision-machined, weld-on O2 bungs are included. Made from 304 stainless billet, they weld beautifully.
- Tig Filler Rod: The kit includes a half-pound package of filler rod, ensuring you have everything you need for a perfect weld.
Performance You Can Count On
The Pro Series Big Block Chevy Header Build Kit is engineered to handle serious horsepower:
- 2″ Primary Tube Header Kit: 450-600 Naturally Aspirated Horsepower
- 2 1/8″ Primary Tube Header Kit: 600-800 Naturally Aspirated Horsepower
- 2 1/4″ Primary Tube Header Kit: 800-950 Naturally Aspirated Horsepower
- 2 3/8″ Primary Tube Header Kit: 900-1100 Naturally Aspirated Horsepower
- 2 1/2″ Primary Tube Header Kit: 1100+ Naturally Aspirated Horsepower
Stay Connected and Inspired
Head on over to the Stainless Headers Mfg. Inc. community on Facebook, Instagram, and YouTube. Stay updated on customer projects, watch how-to videos, and get the latest information about their extensive product lineup.
So, whether you’re building a beast for the strip or the street, the Pro Series Big Block Chevy Round Port Custom Header Build Kit from Stainless Headers Mfg. Inc. is your go-to choice for unparalleled performance and quality. Get yours today and unleash the full potential of your big block Chevy!




