SBC Headers for 1955–1957 Tri-Five Chevy – Bel Air, 150, 210 Series

Replacing or upgrading your exhaust header is necessary for both engine performance and sound. Whether on or off the track, exhaust headers provide more horsepower and improved exhaust sound. FLASHARK offers many products to help you create your own custom engine headers. It's really easy and convenient to use: direct bolt-on, no modification needed. Fitment: 1955–1957 Chevrolet Bel Air 1955–1957 Chevrolet One-Fifty Series 1956–1957 Chevrolet Two-Ten Series For 265–400 SBC Small Block V8 (Straight Plug Only) Note: Also fits other classic Chevy models like Corvette. See full compatibility here . Specifications: 100% brand new, Never been tried or installed Polished Stainless Steel to resist early corrosion Material: Stainless Steel Surface: Mirror Polish 1-5/8" primaries to the 2 1/2" Collectors 2 1/2" to 2 1/4" reducers 3 Stage polish finish Flange Thickness: 35" Tube Outside Diameter: 1 5/8" Collector Diameter: 2 1/2" Reducers: 2 1/2 to 2 1/4" Hardware Included: Yes Gaskets Included: Yes What are exhaust manifolds for? Boost Horsepower and torque, and Save on Gas with Headers and Exhaust System Modifications!" Replacing a vehicle’s headers and exhaust is a way to add horsepower and torque, and it will also increase your vehicle’s volume. Want a car that sounds like an American muscle car should? This header will help your vehicle achieve that and it can add up to 8-20 horsepower. Install an exhaust system means about a 0.5 mpg gas mileage improvement. While that might not sound like much, consider this: If gas costs $3 a gallon, and you drive this truck 15,000 miles a year, you’re saving yourself about $85 a year on gas. In five years, you’ll have saved nearly enough money to pay for a complete cat-back exhaust system. Sharing and affirmation from customers Exhaust Header VS Manifold, which is the better choice? The structural differences between exhaust headers and manifolds are the material and size. From the material, exhaust headers are made of lighter, thinner steel, while exhaust manifolds are made of thick iron. Exhaust headers are also longer than exhaust manifolds. When in use, exhaust manifolds create back pressure, which lowers performance. Because each cylinder of the engine is given its own tube, however, headers eliminate this problem; thus, allowing the gases to exit without the creation of back pressure. Therefore, exhaust headers are a BETTER choice than an exhaust manifold. FAQ Q1: Will these Flashark 1955-1957 bel air/150/210 sbc headers fit all classic Tri-Five configurations? A1: Yes! These high-performance headers are custom-engineered for the iconic Tri-Five chassis. They offer a precise direct bolt-on fitment for the 1955–1957 Chevrolet Bel Air, the 1955–1957 Chevrolet One-Fifty (150) Series, and the 1956–1957 Chevrolet Two-Ten (210) Series equipped with a Small Block Chevy engine. Q2: What cylinder head and plug configurations do these chevy sbc headers require? A2: This exhaust header set is specifically designed to accommodate standard 265, 283, 305, 327, 350, and 400 cubic-inch Small Block Chevy V8 blocks. Please note that they are strictly engineered for straight plug cylinder heads only and will not clear angled spark plug configurations. Q3: Are these considered 1955 chevy fenderwell headers, or do they route inside the engine bay frame? A3: Unlike traditional 1955 chevy fenderwell headers that require cutting into your inner fender liners to exit, these premium Flashark tri five headers feature an under-chassis design. They route cleanly within the vehicle's frame rails, preserving your classic sheet metal while maintaining maximum ground clearance and a sleek engine bay look. Q4: How do Flashark stainless steel headers compare to stock 1955 chevy exhaust manifolds and 1957 chevy exhaust manifolds? A4: Original 1955 and 1957 chevy exhaust manifolds are made from dense, heavy cast iron with restricted, shared ports that generate performance-robbing backpressure. Flashark headers are built from lightweight, mandrel-bent stainless steel with independent 1-5/8" primary tubes, completely eliminating backpressure to add up to 8-20 horsepower and improve mid-range torque. Q5: Can I install these 1957 chevy headers on a classic Corvette with an SBC engine swap? A5: Yes! While optimized primarily for 1955-1957 Tri-Five passenger cars, this high-performance exhaust manifold set is highly versatile and is verified to fit other classic Chevrolet models, including early-generation Chevy Corvettes utilizing standard Small Block Chevy chassis layouts. Q6: What are the exact primary tube dimensions and collector sizes of these 55 chevy headers? A6: These 55 chevy headers are engineered with a 1-5/8" (1.625 inch) outside tube diameter optimized for high-velocity exhaust scavenging. The primary tubes flow into a 2-1/2" diameter collector, and the kit includes a pair of 2-1/2" to 2-1/4" reducers to seamlessly hook up to your custom or aftermarket dual exhaust system. Q7: What kind of muscle car sound profile will these 57 chevy headers deliver to my Tri-Five? A7: Swapping your restrictive cast-iron manifolds for these polished stainless steel headers opens up the acoustic flow of your engine, providing a deep, throaty, and aggressive American muscle car growl under acceleration while maintaining a clean, non-droning sound profile during highway cruising. Q8: Is all the required mounting hardware and gaskets included in this tri five headers kit? A8: Absolutely. Flashark provides a complete, hassle-free installation package right out of the box. This kit comes 100% complete with a pair of mirror-polished headers, matching high-temperature performance exhaust gaskets, 2-1/2" to 2-1/4" reducers, and all necessary flange bolts, screws, and nuts. Q9: How thick is the mounting flange on these chevy sbc headers to prevent exhaust leaks? A9: These headers feature a premium, thick 0.35-inch precision-machined heavy-duty mounting flange. This rugged design ensures exceptional anti-deformation and structural integrity during extreme engine heat cycles, maintaining an airtight, permanent leak-free seal against the cylinder head ports. Q10: Will adding these performance headers improve fuel efficiency on long-distance classic car cruises? A10: Yes. By optimizing cylinder scavenging and dramatically reducing engine pumping resistance, installing this high-efficiency exhaust system can yield an estimated 0.5 MPG improvement in gas mileage, which adds up to significant savings over a driving year. Q11: What advantages does the Flashark 3-stage mirror polish finish have over raw or painted steel headers? A11: Standard raw or painted steel headers peel and rust almost immediately when exposed to road moisture and intense exhaust heat. Flashark headers undergo a meticulous 3-stage mirror polishing process on high-grade stainless steel, ensuring incredible high-temperature oxidation resistance alongside a stunning, show-quality under-hood shine. Q12: What is the manufacturer SKU number for this specific Small Block Chevy header set? A12: The official manufacturer SKU code for this premium 1955–1957 Chevrolet Bel Air, 150, and 210 series polished stainless steel SBC header system is FLES08029.