Skip to content

Questions about installation or compatibility? Call us: +61 405 244 342 / 1300 974 961 | USA/CANADA: +1 213 289 0578
Email: admin@imaraengineering.net | Fast International Shipping Worldwide

Diesel Exhaust Parts for Excavators & Heavy Equipment: OEM Quality, Shipped Worldwide

Exhaust parts are the components that manage combustion gases from the moment they leave your engine cylinders to the point they exit the exhaust stack, and when any one of them fails, your machine does not just underperform, it stops earning. At Imara Engineering, we supply a complete range of diesel exhaust parts for excavators, dozers, wheel loaders, and other heavy machinery, covering Caterpillar, Komatsu, Cummins, Holset, and Hitachi platforms from a single, reliable source. Across this collection, you will find mufflers, turbochargers, EGR valves and emissions components, NOx sensors, and exhaust manifolds, every critical component your machine's exhaust system depends on, sourced to OEM specification and held in stock for fast dispatch.

Every part meets or exceeds OEM specification, whether you are sourcing an original unit or a quality-verified aftermarket replacement built to the same dimensional and performance standard. Aftermarket options are available across the full range for applications where OEM pricing or lead times create operational pressure, and every aftermarket unit in our catalogue has been vetted for real-world compatibility.

Compare (0/5)

18 products

NOx Sensor DZ110621 for John Deere Exhaust System

NOx Sensor DZ110621 for John Deere Exhaust System

Regular price £171.00
Sale price £171.00 Regular price £101.00
NOx Sensor 5WK97360 68227468AA for Truck Exhaust System

NOx Sensor 5WK97360 68227468AA for Truck Exhaust System

Regular price £184.00
Sale price £184.00 Regular price £123.00
Exhaust Manifold 3630172 for Cummins Diesel Engine G50 K50 KT50 KTA50

Exhaust Manifold 3630172 for Cummins Diesel Engine G50 K50 KT50 KTA50

Regular price £311.00
Sale price £311.00 Regular price £113.00
Exhaust Muffler K1002593B for Doosan Excavator DX300 DX340

Exhaust Muffler K1002593B for Doosan Excavator DX300 DX340

Regular price £600.00
Sale price £600.00 Regular price £101.00
Muffler Silencer for Sunward Excavator SWE50 SWE60 SWE70 SWE80 SWE90

Muffler Silencer for Sunward Excavator SWE50 SWE60 SWE70 SWE80 SWE90

Regular price £652.00
Sale price £652.00 Regular price £185.00
Muffler 6261-11-5610 for Komatsu PC600-8 PC650-8EO PC700-8

Muffler 6261-11-5610 6261115610 for Komatsu PC600-8, PC650-8EO, PC700-8 Excavators

Regular price £831.00
Sale price £831.00 Regular price £200.00
Exhaust Manifold Pipes 8943904143 for Isuzu 6BD1 6BG1 Engine

Exhaust Manifold Pipes 8943904143 for Isuzu 6BD1 / 6BG1 Engine – Diesel Engine Exhaust System

Regular price £159.00
Sale price £159.00 Regular price
Komatsu Muffler 6156-11-5281 for PC400-7/PC450-7 Engines

Muffler 6156-11-5281 for Komatsu PC400-7 PC450-7 PC460-7 SAA6D125E-3K - Excavator

Regular price £638.00
Sale price £638.00 Regular price
Exhaust Manifold 7N3486 for Caterpillar 140G and D6H Dozers

Exhaust Manifold 7N3486 for Caterpillar 140G and D6H Dozers

Regular price £408.00
Sale price £408.00 Regular price
Caterpillar Engine Exhaus | Exhaust | Imara Engineering Supplies

Exhaust Valve 188-3122 for Caterpillar C9 Diesel Engine

Regular price £27.00
Sale price £27.00 Regular price
Engine Valve 3142L072, 3142A051. Intake, Exhaust for Perkins

Engine Valve 3142L072 / 3142A051 – Intake & Exhaust Spare Parts for Perkins Diesel Engines

Regular price £22.00
Sale price £22.00 Regular price
Gasket 3681V015 Perkins Cat Massey Ferguson MF 1106D C6.6

Exhaust Manifold Cover Gasket 3681V015 for Perkins, Caterpillar, Massey Ferguson MF 1106D C6.6 Engines

Regular price £57.00
Sale price £57.00 Regular price
Engine Exhaust Valve 6680862 for Kubota / Bobcat – Engine

Engine Exhaust Valve 6680862 for Kubota / Bobcat – Mini Excavator Engine Component

Regular price £35.00
Sale price £35.00 Regular price
Exhaust Manifold 9S2354 for CAT 14E 235 572G 815B 966C

Exhaust Manifold 9S2354 for Caterpillar CAT 14E 235 572G 815B 966C – Engine 3306, 3306B, D6C

Regular price £223.00
Sale price £223.00 Regular price
Muffler for Wheel Loader – Exhaust Silencer Component

Muffler for Wheel Loader – Exhaust Silencer Component

Regular price £161.00
Sale price £161.00 Regular price
Excavator Engine Air Cleaner 6738-81-7500 Exhaust Muffler for Komatsu PC200-8

Excavator Engine Air Cleaner 6738-81-7500 Exhaust Muffler for Komatsu PC200-8

Regular price £641.00
Sale price £641.00 Regular price
Muffler 4196421 for EX60 Excavator

Muffler 4196421 for EX60 Excavator

Regular price £510.00
Sale price £510.00 Regular price

Collection: Exhaust Parts

Why Imara Engineering for Heavy Equipment Exhaust Parts?

When a machine is down, the question is never just which part it is, who can get it right, and how fast. Here is what sets Imara Engineering apart from a generic parts supplier:

  • OEM & OEM-Equivalent Quality — Every diesel exhaust part we supply meets or exceeds the original manufacturer's dimensional, material, and performance specifications. Correct fit. Correct function. No installation surprises.
  • Wide Brand & Machine Coverage — Our exhaust parts range spans Cat, Komatsu, Cummins, Holset, Hitachi, Volvo, and John Deere from compact mini excavators to large mining-class dozers. One supplier for your entire mixed fleet.
  • Aftermarket You Can Trust — Not every job demands OEM pricing. Our aftermarket heavy equipment exhaust parts are selected for field durability and dimensional accuracy, not just the lowest landed cost.
  • Worldwide Shipping from Stock — Most parts dispatch within 24–48 hours. We ship to Africa, the Middle East, Southeast Asia, South Asia, and beyond. Downtime does not respect time zones, and neither do we.
  • Expert Parts Identification — Unsure of the exact part number? Provide your machine model, engine serial, or OEM reference, and our team will cross-reference, confirm fitment, and advise availability before you order.

Exhaust Parts We Supply

Imara Engineering stocks the full exhaust system component range for heavy diesel equipment. Each category below is a dedicated collection with parts listed by machine model, OEM reference, and brand compatibility.

Mufflers for Excavators & Heavy Equipment

The excavator muffler manages exhaust backpressure and noise attenuation — two factors that directly affect engine efficiency and site compliance. A failing muffler raises backpressure, loads the turbocharger unnecessarily, and on regulated work sites, a diesel muffler that no longer meets noise attenuation standards can ground your machine before you have had a chance to act on it.

What we stock:

  • Direct-replacement diesel mufflers for Cat excavators, including the Cat 320 series
  • Komatsu mufflers for the PC200-8 and broader PC series
  • Hitachi excavator mufflers and heavy equipment muffler variants for dozers and loaders
  • Excavator silencer and diesel silencer units for the AU and UK market specifications
  • Aftermarket Caterpillar mufflers — dimensionally verified against OEM specification

Turbochargers for Excavators & Diesel Equipment

The turbocharger is the highest-consequence exhaust component on any diesel machine. When it fails due to oil starvation, bearing wear, or compressor wheel damage, the engine is not far behind. Reduced power, rising fuel consumption, and black smoke from the exhaust stack are early warnings that most operators push past until it is too late.

What we stock:

  • Cat turbochargers — C7, C13, C15, C15 ACERT, 3306, 3406, and 3406e engine platforms
  • Cummins turbochargers — ISX, ISX15, N14, M11, 6BT, 6BTA, and 4BT engine platforms
  • Full Holset turbocharger model range — HX25, HX30, HX35, HX40, HX50, HX55, HX60, HX80, HE400VG, HE351ve, HE351cw, HE551v, HT60, H1C, and H1E
  • Variable geometry turbocharger (VGT) and Cummins ISX VGT turbo replacements
  • Komatsu and Hitachi excavator turbocharger variants

EGR Valves & Emissions Parts for Heavy Equipment

The Exhaust Gas Recirculation (EGR) valve is the cornerstone of diesel emissions compliance on Tier 4 and Stage V machines. A failed EGR valve produces rough idle, power loss under load, elevated NOx output, and, in regulated environments, a compliance failure that can block your machine from site access entirely. The consequences extend beyond the valve itself an EGR system failure left unaddressed accelerates wear on the engine internals it was designed to protect.

What we stock:

  • Cat EGR valves — Cat C15 and broader Caterpillar range
  • Cummins EGR valve and Komatsu EGR valve variants
  • EGR coolers for Cat and Cummins platforms — frequently replaced alongside the valve
  • Diesel particulate filter (DPF) parts and SCR system components for excavators
  • Cummins DEF (Diesel Exhaust Fluid) system parts, including DEF headers and DEF tank filters
  • Exhaust back pressure sensors and EGR differential pressure sensors for Cummins ISX

NOx Sensors for Diesel Engines & Heavy Equipment

A failed diesel NOx sensor does not just log a fault code; it forces your machine into a derated limp mode and, on Tier 4 Final equipment with shutdown logic, can bring a fully operational machine to a complete halt mid-shift. Replacing a NOx sensor from stock is almost always the fastest and most cost-effective resolution available, and it is always faster than extended diagnostics on an emissions system fault.

What we stock:

  • Upstream NOx sensor and downstream NOx sensor variants both cover the SCR positions
  • Cummins ISX NOx sensor and 6.7 Cummins NOx sensor replacements
  • Cat NOx sensor variants for Caterpillar SCR-equipped platforms
  • Detroit DD15 and Iveco NOx sensor options
  • After treatment, NOx sensor units with the correct connector configuration and thermal sealing

Exhaust Manifolds for Cat, Cummins & Heavy Machinery

The exhaust manifold operates at the intersection of extreme heat, high pressure, and constant mechanical vibration. Cracks, warped sealing faces, and failed joints create pressurised exhaust leaks that reduce engine efficiency, expose operators to combustion gases in enclosed environments, and cause accelerating thermal damage to turbocharger seals and adjacent components if not caught early.

What we stock:

  • Cat exhaust manifolds — C15, C15 ACERT, C13, C12, 3208, 3306, 3406, 3406b, and 3406e
  • Cummins exhaust manifolds — ISX, 6BT, ISC, non-EGR ISX variants, and 3-piece configurations
  • Performance aftermarket options — PDI Big Boss exhaust manifold and Full Tilt manifold for Cat C15
  • Exhaust manifold gasket kits and manifold studs for Cat C15 and 3406 B applications

Compatible Brands & Equipment

Our diesel exhaust parts are cross-referenced for the following manufacturers and engine families. Not seeing your machine? Contact our team with your serial number, and we will advise.

Caterpillar (Cat) — C7, C9, C12, C13, C15, C15 ACERT, 3208, 3306, 3406, 3406b, 3406e. Excavators: 320, 323, 329, 336. Dozers: D6, D8, D9. Loaders: 966, 972.

Komatsu — SAA6D102, SAA6D107, SAA6D114, SAA6D125 engine series. PC200-8, PC300, PC400 excavators. D65, D85 dozers. WA470 wheel loaders.

Cummins — ISX, ISX15, ISC, ISM, QSB, QSX, N14, M11, 6BT, 6BTA, 4BT engine platforms across excavator, dozer, and on-highway applications.

Holset (Cummins OEM Turbocharger Brand) — HX25, HX30, HX35, HX40, HX50, HX55, HX60, HX80. HE400VG, HE351ve, HE351cw, HE551v. HT60, H1C, H1E — full model range stocked in the Turbochargers collection.

Hitachi — EX, ZX, and ZW series. Contact our team to confirm fitment by machine serial number.

Volvo & John Deere — Select models available. Contact our parts team with your machine serial number for fitment confirmation.

OEM vs Aftermarket Exhaust Parts: Making the Right Call

Not every exhaust part requires OEM pricing, but not every application can afford the risk of a substandard replacement. Here is a straightforward guide:

  1. Turbochargers & NOx Sensors — OEM or OEM-equivalent only. These are precision components where internal dimensional tolerance and material specification directly determine performance, emissions compliance, and engine longevity. Do not buy on price alone.
  2. EGR Valves & EGR Coolers — Specification matters. Imara Engineering stocks aftermarket EGR valves that meet OEM dimensional and electrical specifications. We do not stock the lowest-cost generic alternatives circulating in some parts markets.
  3. Mufflers & Exhaust Manifolds — Quality aftermarket performs comparably to OEM at a significantly lower cost point. Our aftermarket units are dimensionally verified against OEM specifications for every machine they are listed against.

Every aftermarket exhaust part in Imara Engineering's catalogue is selected based on dimensional conformity, materials specification, and field reliability data from the equipment types it serves, not just price. If you require OEM-sourced units for any component, advise us at the point of enquiry.

Worldwide Shipping on Heavy Equipment Exhaust Parts

Most construction equipment exhaust parts in our range are held in stock and available for immediate dispatch.

  • Dispatch Time — Most orders ship within 24–48 hours of order confirmation
  • Global Coverage — We deliver to Sub-Saharan Africa, East Africa, the Gulf region, South Asia, Southeast Asia, and beyond
  • Shipment Consolidation — Multiple parts and categories can be consolidated into a single shipment — speak to our logistics team
  • Bulk & Fleet Orders — Full exhaust system overhaul kits and bulk orders available. Contact us for a consolidated quote
  • Urgent Orders — Fast-track shipping options available on request. Advise urgency at the point of enquiry, and we will confirm what is achievable

Frequently Asked Questions

Powering Your Projects with Premium Parts.
Your Trusted Source for Heavy Equipment Solutions.
Engineered for Excellence, Delivered on Time.