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It felt like it was suffocating the engine . After a week I put on a GRP and it was night and day in my opinion. Just felt and sounded more free flowing
We second this, and thank you Jimmy for being a great customer of ours! We are excited to earn the business of many of my fellow RLers!
I had a SW on my 997 and then grp on 991.2...grp is very nice but a bit loud for my taste..had to take it off as I drive mine a lot..has 1k miles..message me if anyone wants to buy it! Put on ebay https://www.ebay.com/itm/grp-991-2-b...3/163362999506
Never had a Sharkwerks, but I've had others and the GRP/BBI sounds the best to my ears without giving me a headache after an hour. I also had it on my .2GT3 and plan to put it on my touring.
Here's a clip from my RS, doing launch control at a half mile:
First, not sure why anyone would call it a "bypass" - it's a complete replacement of the center muffler, with piping that has no damping/baffling. Second, given that the replacement systems are all pipe-based with no damping/baffling, I'm not sure there would be much difference between any of the brands.
I would have stayed stock at sea level but went w the SW unit because a) it is proven to fit, b) it's a quality unit, and c) used ones are available/they retain their value.
Buy whatever one you want used, try it out (1 hour installation yourself without a lift or removing the rear bumper, basic hand tools), and if you don't like it, flip it here for what you paid for it.
Bottom line - when the valves are closed, your noise is regulated by the side mufflers and the cats; when open, just the cats. At 5500' ASL the replacement makes the car sound like it does stock at sea level.
If you want to vary the tone more, go take a read of Obsessed Garage's write-up on side and center replacements before dropping any more coin than just getting a used center muffler replacement setup.
We have GRP on our 3RS and absolutely love it. Sounds great from both inside and outside (mostly) the car. Not much change in drone as well. Highly recommended!
11-08-2018, 07:53 PM
