Best Exhaust Downpipe Manufacturers in China: 10 Verified Suppliers for B2B Buyers

Established in 2009 and headquartered in Liangzhu Subdistrict, Yuhang District, Hangzhou, Hangzhou Jinma Pipe Industry Co., Ltd. is a technology-driven manufacturer of automotive exhaust systems, covering SUVs, sedans, heavy-duty trucks and new energy hybrid vehicles alongside a full line of high-performance exhaust products for the vehicle modification market. The company runs a complete in-house process chain - pipe forming, precision welding, surface anti-corrosion treatment and exhaust assembly - so a downpipe moves from stainless strip to finished, coded part without leaving the factory.

That process chain is documented in ten core working procedures, from spectrometric material analysis and wall-thickness measurement on incoming stainless strip, through closed single-point precision pressing, fully automatic pipe-mill forming with continuous TIG welding and weld-seam tracking, CNC laser pipe cutting, and fully automatic CNC bending lines with robotic workpiece handling, to four-column hydraulic forming for special-shaped pipes and muffler housings. Finished downpipes go through air-tightness, burst, fatigue, neutral salt-spray, tensile, flattening and vibration testing before a final pre-delivery inspection, and every unit carries an individual traceability code that links back to the material batch, production team and processing time.

On the commercial side, Jinma operates as a qualified Tier 2 supplier with long-term supporting relationships with Chery Automobile and Geely Automobile, and provides supporting services to auto parts enterprises including Jiefeng and Baolong. Its modification-range downpipes are developed from factory vehicle data - pipe routing, hanger positions and OEM-spec flanges with integrated sealing gaskets - for direct bolt-on installation, built in mirror-polished 304 stainless steel with full fish-scale TIG seams and mandrel-bent one-piece tubing. The company holds more than 10 nationally authorized patents in exhaust structural design, pipe forming and precision welding, and follows a dual-track strategy that consolidates domestic OEM supply while exporting across Europe, America and Southeast Asia.

Founded in 2006 and listed on the Shanghai Stock Exchange under ticker 603121, Huapei is a metal alloy casting and forming specialist whose exhaust-system line covers end cones, bent pipes and flanges - the parts that join a downpipe to the turbo outlet and the midpipe. The group reports long-term supply relationships with turbocharger makers including BorgWarner, Garrett and Bosch Mahle, and has extended into exhaust-system programs with Faurecia and Knorr-Bremse. Registered capital stands at approximately RMB 338.5 million, with 21 invention patents and 81 utility patents on record.

For downpipe buyers, Huapei is relevant where a program needs cast or formed transition components and high-temperature alloy parts alongside bent tubing - turbine-outlet flanges, end cones and commercial-vehicle after-treatment housings - produced under an audited listed-company quality system.

Established in 2003 with registered capital of RMB 56.5 million and around 156 employees, Jinjiang specializes in deep processing of stainless steel tubing and fittings for automotive exhaust systems: argon-arc welded straight pipe, laser-welded straight pipe and bent-pipe series used in mufflers, exhaust elbows and exhaust assemblies. The company holds IATF 16949 certification, has been re-verified as a national-level specialized and sophisticated "little giant" enterprise in 2025, and was named a national green factory in the same year, with 77 patents and five software copyrights on file.

Its tubing reportedly holds more than 60% of the Jilin provincial market for exhaust stainless pipework, and it supplies FAW Jiefang among other truck builders. For buyers sourcing downpipe-grade tube or semi-finished bent sections at OEM volume, Jinjiang is one of the few suppliers with documented passenger- and commercial-vehicle tubing programs in northern China.

Founded in 2002 in Hejian, Hebei, Lantian builds complete engine exhaust systems and components across an 85,000 square meter site with a workforce in the 200–300 range. Product lines cover mufflers, exhaust pipes, exhaust flexible bellows and system hardware, with a stated annual capacity of 600,000 mufflers, 100,000 exhaust pipes and 500,000 flexible bellows. The company passed the automotive TS 16949 quality standard in 2011 and exports to more than 70 countries, with heavy-truck muffler and exhaust-pipe programs for domestic OEMs as its core business.

For buyers in the truck, bus and genset segments, Lantian offers volume production of aluminized and stainless exhaust assemblies including the flexible sections that sit immediately downstream of a turbo downpipe, plus OEM-custom muffler work.

Founded in 2009 and headquartered in Shanghai, Fupower operates four in-house facilities covering exhaust fabrication, silicone hose, carbon fiber components and pre-filters, with a reported combined production area of roughly 17,000 square meters. Its dedicated exhaust fabrication shop produces mandrel-bent downpipes, headers, catback systems and intercooler piping in 304 stainless, titanium and aluminum, supported by a tooling library the company puts at more than 6,600 fixtures, TIG and automatic welding, laser cutting and CNC mandrel bending.

Development work runs from customer drawings or samples through 3D scanning, fixture construction, sample installation testing and pre-shipment 3D scan comparison. The company states that it serves more than 1,000 customers in the United States alone, with additional exports to Canada, Australia, the United Kingdom, Germany, France and Italy across diesel pickup, JDM and European performance platforms.

Operating from Licang District, Qingdao, Mingxin manufactures automobile exhaust components including downpipes, exhaust flexible pipes, mufflers, catalytic converters and tail pipes. The company lists 26 pipe manufacturing lines, 43 bending lines, 18 automatic welding lines and one high-frequency ERW tube line among more than 800 items of production equipment, and catalogs over 400 muffler models and 370 exhaust system configurations.

Its tube-making capability extends to 409L, 436L, 439 and 441 stainless welded pipe and aluminized steel tube produced on the ERW line - the raw material base that downpipe and muffler assembly depends on. Products ship to markets including the United States, Italy, Spain, France, Chile, Peru, Brazil, Australia, Greece, Russia, the UAE and Thailand, with OEM and ODM customization available.

Registered in 2005 with paid-in capital of RMB 5 million, Jugong produces stainless steel bent tubes, automotive exhaust manifolds, headers and downpipes from its plant in Ningbo, working with imported CNC machining centers, CNC bending machines, tube forming machines, CNC lathes and TIG automatic welding equipment. The company develops parts from customer drawings and samples and runs its own mold design and production capability.

Exports account for the overwhelming majority of output, with regular shipments to the United States, Europe, Japan and Australia - a profile that suits buyers who need a development partner for difficult bent-pipework rather than a catalog seller.

Established in 2008 in Yunlong Town, Yinzhou District, Moxin manufactures exhaust manifolds, mufflers, tail pipes and exhaust system pipework for cars, motorcycles and trucks, and holds a patent related to exhaust valve control devices. The workshop is equipped with around 20 CNC tube benders, CNC laser cutting machines, CNC grinders and TIG welding stations, and the company was rated a provincial science and technology SME in 2013.

Moxin builds both performance headers, downpipes and catback systems and conventional replacement exhaust lines across thousands of part numbers, exporting mainly to America, Japan and Europe - useful for distributors who want one supplier to cover both tuning and service ranges.

Founded in 2016 and based at No.222 Xingci 4th Road in the Hangzhou Bay New Area, Aegeus is a registered manufacturer of automobile and motorcycle exhaust systems and components. Its range spans exhaust tips, mufflers, headers, manifolds, downpipes and high-flow catalytic sections, produced in T-201, T-304 and T-409 stainless steel with TIG welding, CNC-machined flanges and polished finishes.

The company builds tooling and fixtures to produce from samples or technical drawings, and most of its output has been exported to the North American and European aftermarket - a straightforward option for buyers adding downpipe SKUs to an existing exhaust program.

Established in 2014 in Anting, Jiading District - Shanghai's auto-industry base - Nuocheng produces muffler and purification assemblies for commercial vehicles, large transport equipment and construction machinery, with registered and paid-in capital of RMB 10 million. The company is certified as a high-tech enterprise and a specialized and sophisticated SME (2024), holds 41 patents including muffler and after-treatment device designs, operates under ISO 9001:2015, and carries an A-level taxpayer rating.

Its mufflers ship to the United States and forklift exhaust units to Germany, and it has won public tenders such as a 2024 muffler project for a Shanxi construction machinery group. For buyers in the off-highway and commercial-vehicle space, Nuocheng covers the exhaust side of the same supply chain that passenger-car downpipe buyers use.