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TopGear Exhausts (UK based) is running a group-buy on their 997.2 Carrera/S center muffler bypass - http://911uk.com/viewtopic.php?t=130642. There are links to the product and a demo video in that post.
It's an X-style setup à la Fabspeed, plus it looks like they add an additional a set of Gundo-like bypass tubes as well:
Their normal list price is £266.67 (excluding VAT), plus £70 shipping from UK to CA (YMMV), totaling £336.67 (~$430 at today's exchange rates).
With the group-buy, I got a roughly $60 discount off that price. But again, YMMV (e.g. differences in shipping).
At that price, I said 'what the heck' and have put one on order. I'll update this thread once I receive it and get around to having it installed,.
http://911uk.com/viewtopic.php?t=129764 ("Askgeez has the Fabspeed one (I think) on his GTS and we've had mine and his running together and I seem to recall we agreed there's not much between them")
I’ve always wanted to see a side-by-side comparison between this type of bypass and the individual crossed pipes-type. The primary issue with the OE muffler is the 180-degree bend, which this type of bypass doesn’t eliminate. Plus, having a crossover right at the midpoint of the bend seems like it would disrupt flow, not improve it.
Does anyone have dyno numbers for either or both types of bypass?
This set does appear to be priced right, although I’m not sure what the shipping would be from the U.K. Looks well put-together, too.
I'm not an exhaust expert, but believe the 180 tubes are open in the middle where they meet which is supposed to create a scavenging affect between the cylinder banks vs. crossed pipes with a direct connection from the header to the muffler.
I have never seen a good dyno or sound comparison between the two designs.
Originally Posted by Iceter
I’ve always wanted to see a side-by-side comparison between this type of bypass and the individual crossed pipes-type. The primary issue with the OE muffler is the 180-degree bend, which this type of bypass doesn’t eliminate. Plus, having a crossover right at the midpoint of the bend seems like it would disrupt flow, not improve it.
Does anyone have dyno numbers for either or both types of bypass?
This set does appear to be priced right, although I’m not sure what the shipping would be from the U.K. Looks well put-together, too.
I personally prefer the Hayward and Scott design which unfortunately is a copy of a popular but expensive American exhaust company. It’s still expensive as in my opinion 2 bent pipes should not cost 500-1000 usd
When I placed the order on Friday, it was past business hours in the UK. Presumably I'll get shipping info in the next few business days.
As regards installing, probably 1-2 months after receiving it.
Originally Posted by Chris M.
From the above thread there is also mention of another brand, Hayward and Scott that is also much cheaper than the US versions. H&S X Pipe
I like the H&S solution, and it's relatively well priced compared to SW and AWE. H&S charge £360 (excl. VAT) plus £145 shipping to CA, so I'd cost me approximately $660 to my door. In practice, that's about $100 more than a Billy Boat solution (but only for those with non-PSE setups).
The TopGear X-pipe solution to my door in CA is $370 (with the group-buy discount). Appeals to my inner cheapskate
Karl.
PS: Just for reference...
The following are the 997.2 Carrera/S bypass options I'm aware of on the market and their list price (excluding sale-tax/VAT and shipping) at the time of writing.
TopGear Exhausts (UK based) is running a group-buy on their 997.2 Carrera/S center muffler bypass - http://911uk.com/viewtopic.php?t=130642. There are links to the product and a demo video in that post.
It's an X-style setup à la Fabspeed, plus it looks like they add an additional a set of Gundo-like bypass tubes as well:
Their normal list price is £266.67 (excluding VAT), plus £70 shipping from UK to CA (YMMV), totaling £336.67 (~$430 at today's exchange rates).
With the group-buy, I got a roughly $60 discount off that price. But again, YMMV (e.g. differences in shipping).
At that price, I said 'what the heck' and have put one on order. I'll update this thread once I receive it and get around to having it installed,.
Price is right for sure but those 180 bends look a bit too much like the stock muffler it replaces for my likes. Compare to the mostly straight Sharkwerks pipes (along with a cut up stock muffler) below. I also have to admit I'm skeptical about these discount bypass systems that keep popping up. Someone posted recently about installing the discount Billy Boat pipes. Required several people to "manhandle" it to finally get it in place.
A matter of personal taste I suppose but I don't really care for exhaust parts (or any parts for that matter) that are so poorly designed or cheaply built that they need manhandling and bending for installment. I had my Sharkwerks pipes replaced as part of a recent rear end collision repair. I asked the body shop manager about the Sharkwerk pipes fitment. "Bolted right on like stock parts" he said.
11-03-2018, 02:18 PM
Topgear center muffler bypass for 997.2
