Borla Exhaust Question
#1
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For those of you with the Borla cat-back systems, which part number did you purchase, #12653 or #12654? The only difference I see is the size of the tip. One is 3.5" and the other 4". I want to be sure of the fitment and don't want to cut anything.
#3
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2008. From what the Borla site says, the #12653 has 4" "race" tips and the #12654 has 3.5". Pretty sure it's the exact same system just larger tips.
#4
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I think the 987.1 had the same exhaust for manual and auto cars, the only difference between the 2 systems is the tip size. Go for the 4", it fills the factory gap nicely.
#5
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Also, Most other manufacturers mention that their systems remove the "secondary" cats, but Borla makes no mention about them. I assume they are part of the pipes that connect to the actual cats themselves. I really need to crawl under this thing and check it out. I know every inch of my spec car but not much about the Cayman S.
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#6
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The 987.1 (06-08) has a cats in the headers and the muffler section. So yes the borla system removes the secondary cats, but it will not trip a CEL or anything like that.
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#9
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Just put the 4 inch on my car, was not quite bolt on but relatively easy, no issue with any warning lights. Love the sound but there is a definite drone between 2400 and 2900, very loud. Just need to keep it in the upper revs
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#10
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Is the drone "drive you out of the car" loud or just a little annoying? Is your car an "S"? 6 Speed? I don't remember what typical freeway cruising speed is, but does the drone fall into that rpm?
#11
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The drone on mine isn't bad in my opinion, doesn't rattle your head or anything. I can still hold a conversation at all RPMs with the exhaust, which couldn't be said for my 964 with a muffler and cat bypass. Also, the drone on mine has gotten lest noticeable after driving the car around for 1k miles or so but is still there.
I like my cars loud and the Borla is almost loud enough for my taste, but probably more than loud enough for my neighbors liking.
I like my cars loud and the Borla is almost loud enough for my taste, but probably more than loud enough for my neighbors liking.
#12
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