Converting rear to split duals
08-24-2016, 04:28 PM
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Converting rear to split duals I'm probably the exception but for 12 years I have been very happy with the single sided dual exhaust. It gave it a little European flair. When I got my car back on the road after the rebuilt differential I've been driving it and been irritated by how loud it is. I run Borla XS Pro mufflers in the '04 position which are considered to be one of the quietest performance mufflers but it's still too loud. I made things louder last year when I put on my Mamo 220 heads and a longer duration cam with a fairly high overlap. The exhaust port is obviously where the sound comes from and with the exhaust valve open longer it lets more noise out. The bigger cubes add to it. When I leave a traffic light it sounds like I'm going full John Force and trying to race everyone.
I've liked my custom designed collectors, X pipe placement and the noted mufflers as far as street performance. The only logical answer was to add more sound deadening but with the aforementioned components the only place to add sound deadening is back in the '05-'06 muffler position. To do that I needed the passenger side cut out with PFYC inserts to trim them out. It is a PITA to get the cut to fit the inserts but i got it done and then attached them with epoxy bumper repair. I'm going to have the current pipes cut off past the mid-mounted Borlas and 30° mandrel bend Pypes' tubes, adding DynoMax race bullets and IMHO some pretty cool staggered dual tips when they get here this week. The ones I'm getting are going to be flat black powder coated though unlike the picture. It should look good and hopefully at least tame the beast a little.
Inserts in waiting for more parts installed
Got the tips today and Dynomax mufflers the other day. I'll be taking it in tomorrow for install and can't wait. The Redtail Performance tips are really nice and heavy. I've never seen a black tip on a car yet but it looked great when I held them up on mine.
I've liked my custom designed collectors, X pipe placement and the noted mufflers as far as street performance. The only logical answer was to add more sound deadening but with the aforementioned components the only place to add sound deadening is back in the '05-'06 muffler position. To do that I needed the passenger side cut out with PFYC inserts to trim them out. It is a PITA to get the cut to fit the inserts but i got it done and then attached them with epoxy bumper repair. I'm going to have the current pipes cut off past the mid-mounted Borlas and 30° mandrel bend Pypes' tubes, adding DynoMax race bullets and IMHO some pretty cool staggered dual tips when they get here this week. The ones I'm getting are going to be flat black powder coated though unlike the picture. It should look good and hopefully at least tame the beast a little.
Inserts in waiting for more parts installed
Got the tips today and Dynomax mufflers the other day. I'll be taking it in tomorrow for install and can't wait. The Redtail Performance tips are really nice and heavy. I've never seen a black tip on a car yet but it looked great when I held them up on mine.
08-26-2016, 09:29 PM
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I hope to get a vid of WOT. Maybe tomorrow if it doesn't rain and I can get it on a dyno at our local cruise. Here's just a startup clip after I got my Dynomax bullets and tips added to the Borla Pro XS mufflers already on it. It only slightly quieted it but it's deeper and zero drone at cruise. It is loud as any of them when I mash it though.
08-27-2016, 02:20 PM
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Well it rained and they never set up the dyno. I was really looking forward to seeing where my new heads and valve train put me and how the car sounded from the outside at WOT. 
