I can probably take my car to JP exhausts, ( http://www.jpexhausts.co.uk/ ) and comback with one of their mild steel custom pipes in 3" fitted £260+vat w/o down tubes (from my decent cast manifolds), after down tubes from there and transport costs, i expect it costing me about £400
![Image](http://www.jpexhausts.co.uk/exhpics/ek_1_5.jpg)
Of course if its worth doing, its worth doing properly! and this also looks like a reasonable option. what you you's think? Cheers
![Not worthy :nw](./images/smilies/icon_pray.gif)
![Arrow :arrow:](./images/smilies/icon_arrow.gif)
Designed for Cosworths, i have eyed up a selection of OMP pipes. ready to go all i need is to get two 2" bends made for down pipes.
stainless steel item shy of £300 offers 30% weight saving over steel
racer style
![Image](http://www.ybracing.co.uk/images/exhausts/QN/QN004.jpg)
"ONE BRAND NEW OMP INOX SS EXHAUST SYSTEM TO FIT:
FORD SIERRA COSWORTH 2WD
> Stainless Steel Construction
> 50/63mm Tail Pipe Diameter
> 2 Sections
In collaboration with well-known tuners OMP produce a complete range of exhaust systems for competition use. Units for Group N/A cars are designed to take the place of the catalyst where applicable.
Fabricated entirely of high quality stainless steel by highly skilled craftsmen.
Reminder: the FIA Group N noise limit is 98 ±2 db.
OMP exhaust systems have significantly lower back pressure values than the original system. In order to achieve the most power from the exhaust system, it will be necessary to tune the air-fuel mixture appropriately."
or this pretty item, £200 steel
![Image](http://www.ybracing.co.uk/images/exhausts/exhaustsintro2.bmp)
http://www.ybracing.co.uk/images/exhaus ... bfo594.jpg
"In collaboration with well-known tuners OMP produce a complete range of exhaust systems for competition use. Units for Gr.N/A cars are designed to take the place of the catalyst. Entirely made from mandrel bent aluminized steel treated with heat-resistant resins, they are engineered for the best torque and horsepower outputs. The torque outputs of these systems also make them suitable for road use.
Reminder: the FIA Group N noise limit is 98 ±2 db.
OMP exhaust systems have significantly lower back pressure values than the original system. In order to achieve the most power from the exhaust system, it will be necessary to tune the air-fuel mixture appropriately.
Section plan of an exhaust system
1) Rear pipe in chromium plated steel
2) High performance damping system: internal drilled tube in aluminized steel AISI F4P8 combined with deadening materials with 2 layers in stainless wool
3) Bottom made with aluminized steel hot-pressing, increased thickness (2 mm)
4) Central muffler pipe and final pipe in aluminized steel Ø: 130 mm thickness: 1,5 mm, treated with thermoresistant resins
5) Welding by means of first quality weld materials "