
Originally Posted by
lo-lyfe
Planning on placing an order for 034 DPs (plus testpipes and catback exhaust) next week and was wondering if its possible to do the install w/o pulling the motor. I know guys have done Piggies by pulling stock DPs out the bottom with the car on jack stands but my concern are the DP heat shields (I know the driveshaft heat shields have to come off). In the case of the Piggie mod, the norm was to leave the DP heat shields in place, but I'm wondering if the thicker 034 DPs will fit with stock DP heat shields and if not, what will I need to do in order to get the DP heat shields out (other than pulling the motor). Is it possible to get the DP heat shields out through the top of the engine bay or from underneath the car? What has to be removed in order to accomplish the removal using either method? Thanks!
Also, I'm running a Stg2 tune with the rear o2s coded out. Will I have to cap off the rear o2 bungs on the DPs or just reattached the rear o2s for simplicity's sake?
You will need to remove the stock heat shields, both because they won't fit, and also because they are not needed. The heatshields are in place due to the pre-cats. Once you piggy your downpipes or installed aftermarket downpipes, you no longer have the catalyst material there. You will have lower underhood temps with no heat shields and aftermarket downpipes versus stock downpipes and heat shields.
The engine definitely does not need to come out. Typically for first timers, the downpipes take about 6 hours. The hardest part is definitely removing the OEM pipes. Without a lift, I suggest you cut the OEM downpipes at the flex joint so you can twist them out. I bent/smashed up the heat shields so they could come out easier. I've never known anyone who had to pull the motor just for downpipes.
How your rear O2's are coded out will determine whether you need to have the sensors plugged into the harness or not. Like you said, it is generally easiest just to leave the secondary O2's hooked up since then you won't need to buy plugs!
Let me know if you have any more questions.
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