1472 Products
KLARIUS Car Parts
Klarius is a UK manufacturer of aftermarket emissions-control components. This collection reflects that specialism closely: exhaust-pipe gaskets, rear and centre silencers, rigid pipes and rubber mounts form the largest groups. Clamps, sleeves, brackets, seal rings, flex sections and fitting kits support those main components, while selected catalytic converters, diesel particulate filters and exhaust trims extend the range.
An exhaust must be identified as a system, not by choosing the section that looks approximately the right length. Check the complete Klarius reference against registration or VIN-derived application data, engine and emissions specification, production date and body style. Then compare flange pattern, pipe diameter, joint type, sensor ports, hanger positions and the relationship to adjacent sections. Universal pipe and flex products require suitable dimensions, material and competent fabrication; they are not substitutes for every vehicle-specific section.
Inspect before ordering. Soot around a joint can indicate leakage, but condensation drainage is not automatically a fault. Knocking may come from a stretched mount, bent bracket or poor clearance rather than a failed silencer. A broken flex section may be the result of excessive engine movement. Replace flattened gaskets and corroded fasteners where required, support the system during assembly and align all sections before final tightening so the exhaust hangs without strain.
Exhaust gases are hazardous, and hot components can cause serious burns. Never run an engine in an unventilated space, and never work under a vehicle held only by a jack. Catalytic-converter or DPF faults need diagnosis of fuelling, ignition, oil consumption, sensors and regeneration conditions before replacement, otherwise the new component may be damaged again. After fitting, check gas tightness, underbody clearance and hanger security both cold and after controlled warm-up, without touching heated metal. Record the fitted reference so any later inspection starts with traceable repair information. Relevant Klarius products are listed below.
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Klarius exhaust and emissions-control parts
Klarius Products Ltd identifies itself as a UK manufacturer of aftermarket emissions-control components, with in-house development, testing and manufacturing. Its official range includes exhausts, catalytic converters, diesel particulate filters and mountings. The collection here is especially strong in the mechanical exhaust path: gaskets, rear and centre silencers, pipes and mounts account for most represented items.
In UK workshop language, catalogue “rear muffler” and “centre muffler” descriptions generally refer to rear and centre silencers. Their purpose is not simply cosmetic noise reduction. The complete exhaust conveys combustion gases away from occupants, controls noise and, where fitted, carries catalytic or particulate-treatment devices and sensor positions. Correct dimensions and gas-tight joints matter throughout.
Understanding the represented Klarius families
| Family | Function | Key checks | Related items to inspect |
|---|---|---|---|
| Rear and centre silencers | Attenuate exhaust noise and form part of the gas path | Body style, pipe layout, hanger location, joints and overall geometry | Mounts, clamps, adjoining pipes and heat shields |
| Exhaust pipes | Connect system sections and route gases safely | Diameter, bends, length, flange, socket, sensor boss and axle clearance | Gaskets, sleeves, brackets and nearby underbody parts |
| Gaskets and seal rings | Seal flanged or formed joints | Shape, bore, bolt pattern, thickness and joint type | Flange flatness, studs, nuts and corrosion |
| Mounts and brackets | Support the exhaust while allowing controlled movement | Location, hole pattern, rubber geometry and load direction | Broken hangers, engine mounts and system alignment |
| Clamps, sleeves and connectors | Join overlapping or butt-ended sections | Pipe outside diameter, clamp design, engagement length and material | Pipe wall condition and available straight section |
| Catalysts, DPFs and flex sections | Treat gases or accommodate powertrain movement | Emissions standard, engine, sensor ports, direction, diameter and length | Root cause of failure, sensors, fuelling and engine movement |
Identify the system before dismantling it
Use the full Klarius number with accurate vehicle details. Registration lookup is useful, but VIN, engine code, fuel type, emissions specification, production date, wheelbase and body form can divide exhaust applications. Estate, hatchback, saloon and van variants may route the rear section differently even when engine descriptions appear similar.
Inspect the existing layout from the manifold or front connection to the tailpipe. Note the number and location of silencers, flange types, sleeve joints, sensors, hangers, heat shields and any previous repair. A mixed system assembled from more than one brand may not reproduce original joint positions. If an old component has been cut, sleeved or welded, its altered length is unreliable as the sole template for a replacement.
| Identification point | What to record | Why it prevents errors |
|---|---|---|
| Vehicle specification | VIN, engine, fuel, build date, body and emissions level | Separates alternative systems within one model name |
| Joint design | Two-bolt flange, multi-bolt flange, ball joint, sleeve or clamp | Determines gasket and hardware requirements |
| Pipe measurement | Outside diameter and usable straight length | Allows an appropriate connector or clamp to be chosen |
| Sensor provision | Number, thread and location of lambda or temperature ports | Prevents a section being fitted with missing or misplaced bosses |
| Support points | Hanger count, orientation and distance from joints | Confirms the system can hang without twisting or contact |
Silencers, pipes and jointing components
Corrosion often concentrates at seams, low points, hangers and welded connections. Assess the whole section: a clamp cannot restore strength to paper-thin pipe, and welding beside widespread corrosion may merely move the failure. Conversely, a sound silencer with a leaking replaceable joint may need only the correct gasket, clamp or sleeve.
Dry-assemble sections where practical. Support each component, engage joints to their specified depth and locate hangers before final tightening. Establish clearance to the body, axle, suspension, fuel tank, brake pipes, wiring and heat shields through the available movement range. Tightening one clamp while the remaining system is hanging under strain can cause knocks, leaks or premature flex and mount failure.
Gasket dimensions in the represented range vary considerably. Never reuse a compressed ring or flat gasket unless the repair information expressly permits it. Clean mating faces without gouging them; inspect studs and threads; use new locking hardware where specified. Exhaust paste is not a universal replacement for a designed gasket and should be used only where the component instructions allow it.
Mounts, brackets and flex sections
Rubber mounts isolate vibration while holding the exhaust at a controlled height. A mount that is stretched, split, oil-softened or distorted can allow impact against the underbody. Compare its hole spacing and moulded orientation: similar loops can carry the load differently. Replace damaged metal hangers or brackets rather than forcing a new rubber onto misaligned rods.
A flexible pipe absorbs limited powertrain movement and vibration; it is not intended to correct a badly positioned system. Before replacing a cracked flex, inspect engine and gearbox mounts, front-pipe alignment and any sign that the braid has been twisted during installation. Choose a universal flex by bore, overall length, flexible length, end style and movement requirement, then have it installed with suitable welding and exhaust-fabrication competence.
Catalytic converters and diesel particulate filters
Klarius explains that a catalytic converter directs exhaust gas through a coated internal monolith, where reactions reduce harmful constituents. A DPF captures particulate matter from diesel exhaust and relies on regeneration and correct engine operation. These components can fail from impact or age, but they can also be victims of another fault.
Before replacement, diagnose misfire, excessive fuelling, oil or coolant consumption, injector problems, pressure-sensor lines, temperature sensors and regeneration history as applicable. Fix upstream causes first. Check that the replacement has the correct sensor ports and orientation, transfer only serviceable sensors using approved compounds and torque, and avoid striking the casing or monolith.
Type approval applies to relevant emissions-control products, not every clamp or gasket. Klarius states that applicable replacement exhausts, catalytic converters and DPFs in its emissions-control range are type-approved. Confirm the specific reference and markings required for the vehicle; do not turn a range-level statement into a claim about an unidentified part.
Diagnosis and post-fit inspection
| Symptom | Possible causes | Checks after repair |
|---|---|---|
| Blowing or ticking | Failed gasket, crack, loose joint or manifold leak | Cold-start leak inspection and safe gas-path check |
| Knock over bumps | Stretched mount, wrong alignment, missing stop or body contact | Clearance at rest and through controlled movement |
| Excessive noise | Perforated silencer, open joint, internal failure or modified system | Joint security and noise assessment under suitable conditions |
| Emissions warning | Sensor, catalyst, DPF, wiring, fuelling or engine fault | Diagnostic data, leak check and relevant drive cycle |
| Repeated flex failure | Powertrain movement, system strain or unsuitable flex geometry | Mount condition and neutral alignment before handover |
After fitting, check every fastener and hanger, ensure no tool or packaging remains on heat shields, start the engine only in a ventilated area and inspect for leaks without touching hot parts. Recheck clearances after the system has warmed and expanded. A short controlled road test can reveal contact under load, but any exhaust gas entering the cabin requires the vehicle to be stopped and investigated.
UK MOT, emissions and workshop safety
The DVSA MOT manual covers exhaust-system security under body and attachments, plus noise, exhaust emissions and relevant warning lamps under nuisance. A new silencer does not assure compliance if another joint leaks, the catalyst is ineffective or the engine has a control fault. Equally, an MOT pass is not a durability forecast for a corroding section.
Exhaust gas contains carbon monoxide and other harmful products. Use effective extraction and ventilation; never idle a vehicle in a closed garage. Allow the system to cool before handling. HSE guidance requires correct lifting points, wheel chocking and stable mechanical support, with no reliance on a jack alone. Protect eyes and hands from rust, sharp edges and falling sections, and support heavy components before releasing their final mount.
Common exhaust repair mistakes
- Ordering by engine size without checking body style, emissions level or production split.
- Blaming a silencer for a leak that originates at a flange farther forward.
- Reusing crushed gaskets or heavily corroded clamps and studs.
- Final-tightening joints before the complete system is aligned on its mounts.
- Allowing pipes to touch heat shields, suspension or the vehicle floor.
- Replacing a catalyst or DPF without diagnosing the fault that damaged it.
- Welding near fuel, brake or electrical systems without appropriate controls.
- Running the engine indoors to search for leaks without exhaust extraction.
Klarius questions and answers
Q: What is the difference between a muffler and a silencer?
A: In this context they describe the same noise-control section; “silencer” is the usual UK term.
Q: Can I identify a Klarius exhaust by vehicle registration alone?
A: Use registration as a start, then verify engine, fuel, build date, body, emissions specification and the installed layout.
Q: Should the whole exhaust be replaced for one leak?
A: Not automatically. Inspect every section and joint, then replace what is defective and any hardware required for a sound repair.
Q: Are exhaust gaskets reusable?
A: Compressed gaskets and seal rings are generally renewal items when a joint is opened; follow the specific fitting instructions.
Q: How is a sleeve size chosen?
A: Match the actual pipe outside diameters, joint form and required engagement, while ensuring the surrounding pipe is structurally sound.
Q: Why replace rubber exhaust mounts?
A: Split or stretched mounts can change alignment, cause body contact and place extra load on joints or flexible sections.
Q: Is a universal flex pipe ready to clamp anywhere?
A: No. It must suit diameter, length and movement, and may require competent cutting and welding into a sound, aligned system.
Q: Does a catalyst fault code always mean a new converter?
A: No. Exhaust leaks, sensors, wiring, fuelling, misfire and engine condition need diagnosis before condemning the converter.
Q: Can a blocked DPF simply be replaced?
A: Replacement may be necessary, but regeneration conditions, pressure sensing and the cause of soot or ash loading must be addressed.
Q: Are all Klarius exhaust products type-approved?
A: Klarius states that applicable exhaust and emissions-control components are approved. Check the status and markings of the exact reference.
Q: What causes a new exhaust to knock?
A: Misalignment, wrong mounts, insufficient clearance or system strain are common possibilities and should be corrected before use.
Q: What is the safest way to check for leaks?
A: Use a ventilated, controlled method without touching hot or moving parts; never remain beneath an inadequately supported vehicle.