DP isnt double penetration either.
I was curious as I needed a new flexpipe, so Im getting a new header+DP+flexpipe from ebay; comes to $73 shipped. The muffler shop wanted to charge $40 for install, for just a new flexpipe which I had to supply ($30). If the Downpipe is 2'', and my catback is 2.5'', will it affect anything? I think its a good price because it is all stainless.

I was curious as I needed a new flexpipe, so Im getting a new header+DP+flexpipe from ebay; comes to $73 shipped. The muffler shop wanted to charge $40 for install, for just a new flexpipe which I had to supply ($30). If the Downpipe is 2'', and my catback is 2.5'', will it affect anything? I think its a good price because it is all stainless.






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