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BMW 325I Exhaust

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Sikky Manufacturing LSX Swap Headers

Sikky Manufacturing LSX swap headers allow perfect drop-in fitment. Designed around using the Sikky mount kits and components, these headers are available for several applications in mild steel, ceramic coated mild steel, or with stainless steel primaries and collectors. (See product Notes and Applications for specific model fitment details.) Features include: * V-band flange pre-installed—clamp and other half included—(not all models) * Includes new gaskets and bolts * May have one oxygen sensor bung installed per header (not all models) Ceramic coating process includes: * Parts are thermal degreased at 750 degrees for 3 hours to remove any impurities and contaminates—the most effective way to clean parts * After thermal, they go through a series of blasting on all surfaces * Once a surface profile is created, they are hand-sprayed with aluminum ceramic coating * After parts are covered, they're put in the oven and cured at 750 degrees for 2 1/2 hours * When curing is complete, they are polished to a high luster in a vibratory polisher using special ceramic beads, along with special soap and water * After polishing, they receive a wipe down and inspection before going to shipping * 3-year warranty on coatings for corrosion

Not Yet Reviewed

$1,170.39

MagnaFlow Direct-Fit Catalytic Converters

MagnaFlow direct-fit catalytic converters are designed for easy bolt-on installation for the professional installer. Welding, cutting, and tube-bending equipment are not required. These cats feature a ribbed body that minimizes expansion and distortion when the converters heat up. The ribs form a channel that protects the cushioning mat from direct exposure to exhaust gases, and they hold the ceramic catalyst in proper alignment. MagnaFlow converters use a monolithic honeycomb catalyst; the ceramic coating is designed for maximum flow and surface area, and the coating method is strictly controlled to maintain exact specifications. Improper coating could result in flow restrictions or an emissions test failure. These converters are designed to exact OE specifications and are available for the most popular vehicle makes and models.

4.07 out of 5 stars ( 424 )

$579.00

$1,496.00

Walker CalCat Universal Catalytic Converters

Specifically created for Californians, Walker CalCat universal fit catalytic converters comply with regulations for OBD-II and pre-ODB-II vehicles. These converters feature a universal, weld-in design at a great cost savings over expensive OEM converters and feature a stainless steel body, heat-shielded pipe, and structural brace for enhanced strength and durability. Get the best balance of performance and price from Walker CalCat universal catalytic converters. Order the model designed for your application needs.

4.8 out of 5 stars ( 41 )

$174.99

AP Exhaust OE Replacement Mufflers

When it's time for a new muffler you can shop for something that might fit, or go with a company that uses 3-D modeling programs for a great fit. AP Exhaust OE replacement mufflers include their Challenge Series and Welded Muffler Assemblies—and are direct-fit, requiring no installation modifications. They feature welded necks for enhanced longevity, minimum back-pressure, and maximum sound control for OE performance. AP's patented single cartridge muffler design is used extensively, and all required brackets are welded to the muffler body for long-lasting strength. AP Exhaust OE replacement mufflers offer a premium direct-fit to quickly get you back on the road. Nearly a thousand models are available; order the size options and configuration recommended for your exhaust setup. Features and benefits include: * Top-quality, heavy-duty construction * Premium-designed to fit and perform like OE welded assemblies * Original equipment appearance and performance * Import and domestic applications * Aluminized components for longer life * Engineered to provide a quiet ride * Easy and quick bolt-on/clamp installation

3.97 out of 5 stars ( 73 )

$410.99

MagnaFlow California Grade CARB Compliant Universal Catalytic Converters

MagnaFlow California Grade CARB Compliant universal catalytic converters help keep the check engine light off. They offer the right fit for a wide array of vehicles thanks to the adaptable universal design (cutting and welding is required). With highly corrosion-resistant, stainless steel construction, you can have confidence in the quality of these catalytic converters. They are designed to meet or exceed California Air Resource Board requirements and have undergone additional testing to comply with CARB guidelines to allow for legal use in California and CARB restricted states.

5.0 out of 5 stars ( 2 )

$476.00

$740.00

Walker Quiet-Flow 3 Mufflers

Replace your OEM muffler with one of these Walker Quiet-Flow 3 mufflers. Manufactured in both steel and stainless steel versions, their turbo-style configuration provides great interior and exterior sound control without decreasing exhaust flow. Available for cars, trucks, and SUVs, Walker Quiet-Flow 3 mufflers give your OEM exhaust the perfect sound that you have been looking for.

4.41 out of 5 stars ( 469 )

$227.99

MagnaFlow Touring Series Performance Exhaust Systems

MagnaFlow Touring Series performance exhaust systems are an ideal choice for those seeking increased performance and better economy. Their straight-through flow designs deliver the ultimate in unrestricted horsepower and torque, while maintaining exhaust efficiency. An engineered balance of interior and exterior noise levels, these kits offer the smooth, deep sound you want—and the wide-open power you need! Touring Series systems feature 409 stainless steel components, all mandrel-bent tubing, and a lifetime construction warranty; they're tested against SAE j1169 standards. MagnaFlow Touring Series performance exhausts are available in numerous configurations, including cat-back and rear axle-back; single, dual, tri, or quad mufflers; and several outlet and tip options. Order the model tailored for fitment on your specific vehicle.

4.24 out of 5 stars ( 17 )

$864.00

$1,356.00

On Sale

Dinan Free Flow Stainless Exhaust Systems

Dinan offers a wide range of exhaust upgrades for imports like BMW, Audi, and Volkswagen. Their free flow stainless exhaust systems are precision-engineered for optimum power gains—with a civilized, sporty exhaust note that's appropriately aggressive at wide-open throttle. Plus, there's no irritating low-rpm "drone" that is common with so many other aftermarket mufflers. These free flow systems are manufactured from stainless steel, inside and out, for maximum resistance to corrosion and reduced weight (by 30 percent). They utilize the OE brackets and hangers for mounting in factory-like fashion. Order the Dinan free flow stainless exhaust system designed for your vehicle application.

4.0 out of 5 stars ( 4 )

$921.95

MagnaFlow Universal Catalytic Converters

MagnaFlow universal catalytic converters by Car Sound form the basic building blocks for many applications. The main benefit of universal catalytic converters is that one unit may cover a wide variety of vehicle makes and models. Installing universal converters often requires the use of welding, cutting, and tube-bending equipment that is readily available to most professional installers. They are extremely well made, with features such as: * A ribbed body that minimizes expansion and distortion when the converter heats up. They form a channel that protects the cushioning mat from direct exposure to exhaust gasses, and hold the ceramic catalyst in proper alignment. * A 1/2 in. lap joint where the necks meet the body. The neck does not extend into the converter body, where it could hamper exhaust flow. * Manufactured with separate dies on different sized inlets. Putting larger neck sizes on smaller bodies would reduce the flow of the converter and the quality of the product. * A monolithic honeycomb catalyst. The ceramic is designed for maximum flow and surface area. The coating method is strictly controlled to maintain exact specifications. * Seam-welded close to the converter body for a strong, tight bond. Welding along the edge could allow the converter to expand like the folds in an accordion, allowing the catalyst to move around. * Heavier-gauge stainless steel, tip-to-tip. They do not use inferior mixed weights and materials. * An aluminized or stainless OEM-style ribbed heat shield that creates a rigid wall of protection against heat and adds to the structural stability of the converter.

4.63 out of 5 stars ( 187 )

$124.00

$189.00

Clearance

Catco Universal-Fit Catalytic Converters

Catco universal-fit catalytic converters offer great features, including aluminized steel heat shields (many have dual shields), 409 stainless steel shells, 16-gauge stainless steel pipes and nipples, and a heat-resistant sealed mat—all of which help the converters last longer. These converters are designed so that you can add one to any vehicle that wasn't originally equipped with one. Many models have steel air tubes with numerous perforations to help distribute the airflow evenly without robbing power, and most have slip-fit connections for an easy installation. Choose the inlet/outlet diameters needed for your application.

4.43 out of 5 stars ( 7 )

$238.99


$93.50

$176.99

AP Exhaust Hangers

AP Exhaust hangers are precision engineered for easy installation. They're available in hundreds of configurations, as well as a variety of sizes and materials, to hold your exhaust system safely and securely.

4.64 out of 5 stars ( 100 )

$25.99

$57.99

AP Exhaust Universal Catalytic Converters

AP Exhaust universal catalytic converters will work to make your vehicle energy efficient and environmentally friendly. They're built with 409 stainless steel shell and neck construction for longer life, and feature AP's "Clean by Design" premium-grade ceramic substrates for maximum pollution reduction. Offering comprehensive coverage, AP Exhaust can provide universal catalytic converters with lower emissions, long-term reliability, and an easier install. The growing concern for the environment means there is a growing need for quality emission control products. AP Exhaust universal catalytic converters offer the quality, fit, and value to meet those concerns.

3.38 out of 5 stars ( 8 )

$59.99

$150.99

Vibrant Performance Exhaust Manifold Flanges

Vibrant Performance exhaust manifold flanges are available in stainless steel and mild steel for use in a wide range of applications. They feature optimized port sizing for use with your tubing or pipe. Vibrant Performance takes great pride in the quality of their products, so you can be assured that you're getting professional-grade fabrication components.

Not Yet Reviewed

$96.99

$108.99

Clearance

PaceSetter Direct-Fit Manifold Catalytic Converters

Pacesetter direct fit manifold catalytic converters are custom-engineered to deliver maximum performance and efficiency from your engine. Designed for an easy installation, the units are manufactured from mandrel-bent, 16-gauge stainless steel, and use a stainless steel converter. They're available for many popular late model applications.

4.2 out of 5 stars ( 15 )

$486.99


$358.50

Clearance

Catco Federal/EPA Direct-Fit Catalytic Converters

Catco prides itself on leading the industry in new product development and efficient manufacturing processes for its EPA- and CARB-compliant catalytic converters. Aristo's proprietary substrate chemistry yields highly efficient loadings for lower cost and better converter efficiency while Catco's latest advanced-manufacturing technology ensures that all converters are built to exact OE dimensions and fitment. All this allows Catco to maintain industry-leading efficiency, productivity, and competitive pricing. Catco Federal/EPA direct-fit catalytic converters feature: * 409 stainless steel shell and neck construction for longer life * Aristo Clean by Design advanced catalyst technology to handle the toughest emissions problems * Increased precious metals loadings * Improved O2 storage and release * Exact O2 sensor location(s) * Lower emissions output * Long-term reliability * Keeps the MIL light off * Hardware included (where needed) * Provides for faster and easier installations * 5-year/50,000-mile warranty on converter body * 25,000-mile warranty on emissions

3.43 out of 5 stars ( 7 )

$674.99

$687.99

AP Exhaust Direct-Fit Catalytic Converters

AP Exhaust direct-fit catalytic converters will render your vehicle energy efficient and environmentally friendly. They're built with 409 stainless steel shell and neck construction for longer life, and feature AP's "Clean by Design" premium-grade ceramic substrates for maximum pollution reduction. Offering the most comprehensive coverage, they can provide direct-fit catalytic converters with lower emissions, long-term reliability, and an easier install. The growing concern for the environment means there is a growing need for quality emission control products. AP Exhaust direct-fit catalytic converters offer the quality, fit, and value to meet those concerns. Order the model designed for your vehicle application.

3.68 out of 5 stars ( 31 )

$697.99

$731.99

Rein Automotive Exhaust Bushing and Sleeves

Fabricate your custom exhaust assembly with exhaust bushing and sleeves from Rein Automotive. These quality OEM-style components are designed to provide a tight and secure fit, preventing exhaust system vibrations and noise. Select the exhaust bushing and sleeves for your application needs.

Not Yet Reviewed

$5.99

BRExhaust Direct-Fit Exhaust Systems

BRExhaust direct-fit exhaust systems take the guesswork out of replacing your system. Offering the same sound and reliability as the OEM exhaust, you will find all the gaskets and clamps needed to get the job done in the box. Precision mandrel bent pipes facilitate superior exhaust flow, and the multi-piece, bolt-on design ensures the exhaust system is easy to install and will fit perfectly to help get you back on the road in no time. No bending, welding, or cutting is required for installation. BRExhaust direct-fit replacement exhausts are manufactured from durable aluminized steel with a 2-year warranty or stainless steel with a limited lifetime warranty. Choose the system designed for your vehicle.

3.94 out of 5 stars ( 66 )

$344.00

$825.00

Standard Motor A.I.R. Diverter Valves

Air injection systems include certain safety checks which prevent exhaust from forcing its way back toward the pump, or from overloading the manifold. Standard Motor A.I.R. diverter valves are one such component. These replacements are manufactured from durable materials, built to factory specs, and will easily install in the stock location. If your bypass, diverter, or check valve is damaged or missing, find the Standard Motor part to fit your specific make and model.

5.0 out of 5 stars ( 1 )

$133.99

Dorman Secondary Air Injection Pumps

The secondary air injection pump is an emissions control device used to heat the catalytic converter to optimal performance temperature. Dorman offers direct replacements which have been thoroughly tested for fit, function, and endurance. If your state requires the secondary air system to function properly to pass inspection, check out Dorman's selection for your vehicle to make the grade.

4.0 out of 5 stars ( 1 )

$189.99

$302.99

Dorman AIR Check Valves

These Dorman A.I.R check valves are direct replacements for your OE A.I.R check valve. Dorman has been an industry leader in producing quality replacement parts and continues to strive for excellence. When you're trying to get your vehicle back on the road, look no further than Dorman.

5.0 out of 5 stars ( 4 )

$103.99

Rein Automotive Exhaust Nuts

Rein Automotive exhaust nuts are manufactured to strict engineering standards and specifications in materials and tolerances to ensure proper mounting and retention of exhaust components like a flange or turbocharger. Designed as direct-fit replacements, this quality OE-style hardware is identical to OEM for your specific model, ensuring proper fit and function. Rein's exhaust nuts are offered in individual piece counts for your repair and replacement requirements. Order the hardware for your application needs.

Not Yet Reviewed

$1.99

Catco Direct-Fit Catalytic Converters

Since you have to use a catalytic converter anyhow, you might as well use one that will last a long time and maintain your vehicle's performance level in the process. Catco direct-fit catalytic converters feature 409 stainless steel shells, 16-gauge stainless steel pipes and nipples, and a heat-resistant sealed mat—all of which help them to last longer. These Catco units are direct replacements for OE converters and will install with little or no modification. Some converters have steel air tubes with perforated holes to help distribute the airflow evenly, without robbing power. New flanges are included when necessary. Order the model designed for your vehicle application.

4.25 out of 5 stars ( 55 )

$669.99

$710.99

URO Parts Air Injection Pumps

URO Parts air injection pumps are designed to comply with all applicable air pollution regulations. Like all of their exhaust emissions components, they are carefully engineered to withstand the challenges of today's deteriorating traffic conditions. URO Parts air injection pumps are manufactured using only premium materials and components to survive high underhood temperatures, constant vibration, and high pressures. Built in the same factories as many much more expensive OE parts, URO Parts offers the same or better quality, durability, and reliability.

Not Yet Reviewed

$166.99

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