Ultimate Headers 321 Stainless Steel Headers

4.6 out of 5 stars 5 Customer Reviews

Ultimate Headers 321 Stainless Steel Headers integrate a cutting-edge, patented design, created specifically for maximum performance and minimal weight, with 3D-eng

Ultimate Headers 321 Stainless Steel Headers integrate a cutting-edge, patented design, created specifically for maximum performance and minimal weight, with 3D-engineered flanges, and superior 321 stainless steel to deliver a unique combination of elegance and horsepower. Born in World War II for aircraft engine exhaust manifolds by adding titanium to basic nickel/chromium alloy steel, 321 stainless provides reduced weight, plus increased resistance to material fatigue and thermal cracking in high-heat environments. Finite Element Analysis (FEA) processes are used to create Ultimate Headers and the unique Ultimate Flanges with their signature, high-tech, ribbed reinforcements that reduce weight, improve flange cooling, and lessen heat-induced warpage; while providing the required clamping forces to eliminate leakage. Ultimate 321 Stainless Steel Headers' tight radius, investment-cast, 316L stainless steel elbows immediately turn the header tubes away from the exhaust ports with a radius smaller than the tube diameter (which can't be done using a tube bender); holding the header tubes close to the block—perfect for engine swaps. Investment casting also maintains the desired wall thickness and avoids the thinner sidewall created by tube bending at the point where exhaust gas temperature and volume are at their highest. These benefits, combined with the advanced Cometic MLS (multi-layer stainless steel) header gaskets included with each set of headers, give Ultimate Headers 321 Stainless Steel Headers the leading edge when it comes to adding a total performance-enhancing exhaust system. Features include: * Patented design * Includes premium corrosion and heat-resistant ARP 12-point, 300 grade stainless steel bolts and washers * Jig fixture, TIG-welded for precise quality control * Easy to install * Header tubes are mounted high and tight for a compact, space efficient package away from steering shafts and frame rails * Eye-catching flanges add dramatic improvement to the engine compartment * Available styles include rear-dump and block-hugger designs * Available in a variety of finishes, including mill, satin, mirror polish, ceramic coated silver, and ceramic coated black *Ultimate Headers Cast Header Flanges or Extreme Low-Profile Clamps (both sold separately) are recommended for the end of the collectors

Results 1 - 25 of 59

Ultimate Headers 321 Stainless Steel Headers 102121

Headers, LS Engine Swap, Long Tube, Stainless Steel, Mill Finish, Chevy, Pontiac, Pair

Part Number: JBC-102121

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Ultimate Headers 321 Stainless Steel Headers 471011

Headers, Coyote Engine Swap, Block-Hugger, Stainless Steel, Mill Finish, Ford, Pair

Part Number: JBC-471011

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Ultimate Headers 321 Stainless Steel Headers 101094

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Silver Ceramic Coated, Chevy, GMC, Pair

Part Number: JBC-101094

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 202081

Headers, Long Tube, 321 Stainless Steel, Natural, 1 5/8 in. Primary, 2 1/2 in. Collector, Chevy, Small Block, Pair

Part Number: JBC-202081

Not Yet Reviewed

Estimated Ship Date: Jan 2, 2026 if ordered today

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Estimated Ship Date: Jan 2, 2026 if ordered today

Ultimate Headers 321 Stainless Steel Headers 202011

Long Tube Headers, Small Block Chevy engine for a 1st Generation Camaro, Stainless, pair

Part Number: JBC-202011

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101015

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Black Ceramic Coated, Buick, Chevy, Pontiac, Oldsmobile, Pair

Part Number: JBC-101015

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101022

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Satin Finish, Chevy, Pontiac, Pair

Part Number: JBC-101022

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101024

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Silver Ceramic Coated, Chevy, Pontiac, Pair

Part Number: JBC-101024

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101033

Headers, Block-Hugger, Stainless Steel, Polished, Slight Offset Center Exit, Chevy, Pair

Part Number: JBC-101033

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101034

Headers, Block-Hugger, Stainless Steel, Silver Ceramic Coated, Slight Offset Center Exit, Chevy, Pair

Part Number: JBC-101034

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101035

Headers, Block-Hugger, Stainless Steel, Black Ceramic Coated, Slight Offset Center Exit, Chevy, Pair

Part Number: JBC-101035

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101052

Headers, LS Engine Swap, Block-Hugger, Stainless Steel, Satin Finish, Chevy, Pair

Part Number: JBC-101052

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101054

Headers, LS Engine Swap, Block-Hugger, Stainless Steel, Silver Ceramic Coated, Chevy, Pair

Part Number: JBC-101054

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101064

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Silver Ceramic Coated, Chevy, Pair

Part Number: JBC-101064

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101044

Headers, LS Engine Swap, Block-Hugger, Stainless Steel, Silver Ceramic Coated, Center Exit, Ford, Pair

Part Number: JBC-101044

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111012

Headers, Mid-Length, Stainless Steel, Satin Finish, Swept Back, Chevy, Pontiac, Gen V LT, Pair

Part Number: JBC-111012

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111013

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Polished, Swept Back, Chevy, Pontiac, Gen V LT, Pair

Part Number: JBC-111013

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111015

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Silver Ceramic Coated, Fits Detroit Speed Subframe, Chevy, Pontiac, Gen V LT, Pair

Part Number: JBC-111015

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111022

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Satin Finish, Chevy, Pontiac, Gen V LT, Pair

Part Number: JBC-111022

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111024

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Silver Ceramic Coated, Chevy, Pontiac, Gen V LT, Pair

Part Number: JBC-111024

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111025

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Black Ceramic Coated, Chevy, Pontiac, Gen V LT, Pair

Part Number: JBC-111025

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111082

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Satin Finish, Chevy, Gen V LT, Pair

Part Number: JBC-111082

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 111084

Headers, LT-1 Engine Swap, Mid-Length, Stainless Steel, Silver Ceramic Coated, Chevy, Gen V LT, Pair

Part Number: JBC-111084

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101012

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Satin Finish, Buick, Chevy, Pontiac, Oldsmobile, Pair

Part Number: JBC-101012

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

Ultimate Headers 321 Stainless Steel Headers 101095

Headers, LS Engine Swap, Mid-Length, Stainless Steel, Black Ceramic Coated, Chevy, GMC, Pair

Part Number: JBC-101095

Not Yet Reviewed

Estimated Ship Date: Nov 28, 2025 if ordered today

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Estimated Ship Date: Nov 28, 2025 if ordered today

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