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Exhaust System Resonator Specification Example for Workshop Replacements: Quick Fit Version

Source:Cylinder Head Repair / Time:2026-09-18

Exhaust System Resonator Specification Example for Workshop Replacements: Quick Fit Version

This is a worked specification for exhaust system resonator in a quick fit version programme. It is the document we would send a buyer who asks what exactly they are getting: the material, the dimensions that are actually controlled, the finish, and the checks that happen before anything is packed.

The quick fit version version exists because the duty cycle on workshop replacements is not the same as on a showroom vehicle. Where the two are specified identically, something fails later — usually a supplier who changed material without saying so.

Exhaust System Resonator

Example specification

ItemExhaust System Resonator
ApplicationWorkshop Replacements
VersionQuick Fit Version
Base materialBrass
Controlled dimensions3 key dimensions, recorded per lot
Tolerance band±0.5 mm
Finishzinc plated
MOQ1,000 pieces per specification
Sampling10 working days, 5 days per revision
ComplianceSGS

How the example is built up

  1. Start from the duty cycle, not from the catalogue photograph.
  2. Fix the base material in writing — Brass, in this example.
  3. List the dimensions that are actually controlled and the tolerance on each.
  4. Name the finish and what it has to survive.
  5. State the inspection level and who pays when a lot fails.

Exhaust System Resonator example

Processes involved

  • precision stamping
  • robot welding
  • laser cutting
  • sintering
  • cold forging
  • powder coating

Where this example applies

Programmes that run quick fit version most often specify this build for workshop replacements. Related applications include aftermarket retail, delivery vans, boat trailers, emergency vehicles, off-road bikes.

Checks before packing

  • Dimensional report against the approved drawing.
  • AQL 4.0 sampling on the finished lot.
  • Finish inspection under agreed lighting.
  • Carton drop test on the first lot of a new packing specification.

Questions buyers ask

What is the minimum order quantity?

The standard MOQ is 1000 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.

What happens if a lot fails inspection?

The lot is re-inspected against the golden sample, and replacement pieces ship on the next available booking at our cost.

How is packing specified?

Individual packing, inner box quantity and carton marking are confirmed at quotation stage so the cartons arrive ready for your warehouse.

What testing is included?

Standard lots ship with dimensional and hardness reports. SGS documentation is issued with the shipment when your market requires it.

Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.

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