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piggie pipes no longer require welding
Posted by:
RMcQ on 2006-04-19 18:19:42
Account #:
2021
The idea with modifying stock down pipes is to gut the pre-cats for improved flow and performance. This is a
low cost DIY mod if you are willing to invest the labor. Getting the pipes out of the car involves 4 bolts on the
turbos, 2 o2 sensors, one hanger bracket bolt, and the exhaust clamps beyond the main cats. It doesn't sound like
much, but it is a good bit of labor to get it all out.
When the down pipe (DP) is out of the car this is what you have (note: the first 3 pics are not mine)
Borrowed pic showing components of DP:'
When you look down into the stock DP, this is what you see. The mesh is of course the catalytic material. Think
this affects flow much being only a couple inches from the turbine wheel?
The "harvesting" strategy involves basically bashing the material out. I used a combination of cold chisels, pry
bars, long drills, and long neck pliers. This stuff puts up a good fight. Eye and breathing protection mandatory.
So once I got them gutted I had to clean them up a bit. I used a wire wheel and a flapper wheel. They looked so
nice afterward (as if I am a machine shop or something. ha!)
DP with ick:
Tool 1:
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