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rangi decats a primapy downpipe


lachlan

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righto fulleas and fulleasses this is how a lazy shart gets the cat out a primary dp .

the engine was out of the car and this whole exercise took less than half an hour

step one . grind through the crappy lil welds holding the bottom heat sheild on

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step 2 chop a square hole

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select an impliment

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introduce chosen impliment to cat internals .bash it right through . ream it round a bit . pull it out . bash it through on an angle . repeat a few times . once youve been through it a few times it will break up into chunks . can smash most of it up by hand

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might need to give it a bash and a shake . comes out pretty easy

keep going untill it stops rattling much . and untill you get these 3 bits of mesh out .

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much better

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weld your square back in

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weld the heat sheild back on with 5 little ****ty bits of weld

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yeah there are easier ways to do this or more professional ways . getting a piece of pipe suitable is difficult and actually getting it to fit requires a few goes at tacking it and being under the car etc . this you can do on the driveways in your jandles and be guranteed it will fit back on exactly like it was . this literally took half an hour and ten minutes of that was fixing the welder

i think i did this once for a single turbo dp aswell . to be honest you are better off cutting the side out of the cat pulling the cat guts out and welding the side back on and its fkn hard/takes longer to smash right through the 2 cores in a single dp. then u can take the cat core to the scrappys for $30

if u need to replace a primary turbo then its the prefect time to do this . and replace the turbo to intercooler hoses at the same time . will literally make it feel like a new car

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nah the secondary down pipe has a join in it . but no cat . the primary downpipe is one piece from turbo to a bolt on flange right at the merge .

or are you talking about the main cat ? right after the merge ? yeah u can jus unbolt right next to that and bash it out

i really dont think this cat is doing much after 20 years and 200000 kays . well it restricts the exhaust and the noise but thats no use

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  • 1 month later...

The 2nd cat is easy to replace with a pipe . The primary cat is a pain coz it needs a bend and is in a difficult place to mock up etc .

I only do it this way coz its easy and its gunna fit perfectly

Id do it and see how u get on . If its a problem try change some restrictors . After that drill the wastegate hole out . The vf13 waste gate hole is fkn tiny . Like 13 mm . The vf26 waste gate hole is bigger .

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