Ebay... But you don't want to de-cat a 1.1. You'll loose so much back pressure. A decent high flow exhaust with a sports cat and 4-2-1 manifold. Actually... I think pugsport do exhausts for a 206....
quick google didnt turn anything up for a 206 but a 106 came back around £300 for cat back.
watch if your buying cheap manifold as the quality on the weld might not be up to scratch and start cracking.
tbh frank mate id say your wasting your money, put it in a pot for a better car/engine. the 1.1 isnt going to give you much for alot of money
I was being a bit nice...
Just replace with a bog standard exhaust system, and save for a newer car. Maybe even a 206 gti?
Why do you want back pressure?
Almost every engine is different so there's no real calculation I'm aware of, it boils down to finding someone who has already tuned a exhaust system for your particular car, I've heard of gains between 15 and 25 kW by changing to a properly tuned system, unfortunately these are usually hard to find and very pricey. The real problem is to find someone that has tuned up a system for your car already, as this is usually done in a trial and error manner.
Excellent write up OG. Cleared up a lot of misconceptions people have with regards to the size of exhaust to go for.
You see a lot of boy racers with big exhausts knocking about thinking its making the car faster when in fact it's either made no difference or had a negative affect.
Is there a guide to what size pipe is most efficient to horsepower?
Does having a turbo come into the equation as they run on exhaust gases?
If my questions don't make any sense apologies in advance
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