High-performance exhaust system
Case Studies
Automotive£1.3m / yr saving

Should Costing for Exhaust System

Foremost high-performance car maker in the automotive sector - Titanium vs Stainless Steel material decision

May 28, 2026·6 min read

Product

Exhaust Assembly

Volume

300 Pieces

Location

UK

Material

Ti vs SS

Saving

£1.3m / yr

Problem Statement · Business Challenges

What the client needed to solve

  • Creating an achievable budget for this sub-assembly which meets the target cost for the vehicle.
  • Negotiating a purchase price which meets the budget.
  • Selecting the optimal material type - Titanium or Stainless Steel - based on the cost of manufacture.
  • Setting a defensible supplier target cost ahead of commercial negotiations.

Project Specification · Scope of Work

What Emithran was tasked to do

  • Review the current design and determine the cost of the exhaust assembly using the Should Cost methodology.
  • Estimate the cost at UK conditions for manufacture in Titanium.
  • Estimate the cost at UK conditions for manufacture in Stainless Steel.
  • Identify cost drivers and provide actionable recommendations for reduction.

Technical Information · Product Description

Exhaust Manifold Assembly

Major Parts

  • Manifolds
  • CAT chambers
  • Lambda sensors
  • Fully pressed muffler (upper & lower shell)

Construction

Primarily sheet metal and pipe formed along with welding. 4-channel catalytic conversion system with a single diffuser at the end.

Key Aspects

  1. 1.Optimum process adopted using best technology
  2. 2.Appropriate machine selection
  3. 3.Appropriate process parameter selection
  4. 4.Up to date cost data for materials, machine and labour at the manufacturing location

Deliverables

  1. 1.Should Cost analysis for the exhaust assembly for both Titanium and Stainless Steel
  2. 2.Identification of cost drivers and recommendations for cost reduction
  3. 3.Customer knowledge-base documentation compiled

Cost Drivers for Exhaust Assembly

Case Comparison: Titanium vs Stainless Steel

Case 01

Titanium

Manufacturing Location: UK

Total Cost

£13,260

Major Cost Drivers

Manifold Exhaust LH & RH23%
Exhaust Silencer16%

Case 02 · Recommended

Stainless Steel

Manufacturing Location: UK

Total Cost

£8,910

Major Cost Drivers

Manifold Exhaust LH & RH22%
Exhaust Silencer13%
£4,350 saved per unit· 300 pcs = £1.3m / yr

Value Additions

What Emithran delivered

£1.3m

Annual Cost Saving

Identified by switching from Titanium to Stainless Steel across 300 units per year.

100%

Target Cost Coverage

Supplier target cost established against every component in the exhaust assembly.

VBN

Negotiation Ready

Emithran cost breakdown enabled value-based price negotiation with suppliers.

DFM

Design Optimised

Main cost drivers identified via value engineering - design optimised for cost.

For Enquiry

Want a should-cost analysis for your assembly?

Talk to our engineering team. We scope, model, and deliver a cost breakdown you can take straight into supplier negotiations.