WTB GGB Header Inserts
- Thread starter Whaler
- Start date
From what I have seen people run in the past. They take a few small pieces of pipe, and weld them together into a small cluster. Looks kind of like comb from a bee hive. Then they weld a small mounting tab to the bottom that will allow them to bolt them into the header. The pipe offers minimal restriction, but will stop a flashlight when inserted into the header to see if you have baffles. I haven't heard of anyone complaining about noise enforcement lately. Just always run water to not draw attention to yourself. They like to see the steam I guess.
Whaler
Member
That’s a good idea. At present I don’t have the plumbing for wet headers although my Bassets have the plumbing bosses installed and currently plugged. I’ll need to look into the plumbing further than I have but from what I’ve read so far is a little discouraging… valves, pills, switches, rpm limits, etc. I try to minimize those apparatus in my life. Should I get over it and get in line? lol
Whaler
Member
I’m a v-drive. I read a comment on an old post that said “do you want to buy your mufflers before or after your excessive noise ticket?” I think that’s spot on. When I was involved with drag racing NHRA wanted to muffle the sportsman classes in the mid-nineties and most guys sucked it up and bought the Borla units. Today they’re $725/ea. and I’m not certain they can get under the 90 db all the way to say 3000 rpm. I’ve even considered thru-transom exhaust but the setup doesn’t appeal to me on a flat bottom. The shotgun tips may be the way to go although the look isn’t ideal. They claim a 14 db reduction, no performance hit and improved low to mid range. I still have 3 months to figure something out before Plowman’s get together so there’s hope!
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Whaler
Member
That’s funny. After lots of research it seems the best option for me is the 4” Gibson clamp-on mufflers. They’re priced between $600-737, depending where you buy them. The Borla 4-pipe mount setup is quality stuff but it’s overpriced imo, and it removes the collector extension area (4”) where the real scavenging is created in the header. That area, just downstream of the 4 to 1 collector, should ultimately be no less than a continuous constant diameter pipe of no less than 14”. At least this was the case in moto-GP bike exhaust. This isn’t hyperbole, it’s dyno proven. The same physics apply to these headers, the collector creating a venturi of high velocity exhaust gasses and the same diameter (4”) pipe must be maintained for no less than 14”. This creates a high velocity column of hot gases ripping through the tail section creating monster vacuum. Damn,… I need a cigarette.
So what about the Borla… they interrupt that continuous pipe section and you have to accept their science in lieu of the aforementioned dyno proven results. It’s a leap of faith at what they’re charging for these mufflers. Also, if you don’t care for the sound, db, or performance hit you get to weld the collector and tailpipes back on that you previously cut off to install the Borla.
At least with the Gibson mufflers, you clamp on aft of the continuous 4” pipe segment, you can remove both in 10 mins if you want open headers, and they’re much more affordable and they boast 304 stainless steel throughout.
Today I’m having delivered ChemicalGuys 2 disk 4” header insert. Yes, it will impede the gas flow some, but I’m willing to do that in order to reduce my db in a cost effective manner. It’s a gamble whether the compromise will be acceptable but it’s $130 I’m willing to wager. If it doesn’t fly then I’m buying the Gibsons.
Wet pipes don’t interest me. I have black Basset twisties that love heat as does the exhaust gas in the velocity sense.
What the hell just happened? Oh yeah, I had a second cup of coffee!
So what about the Borla… they interrupt that continuous pipe section and you have to accept their science in lieu of the aforementioned dyno proven results. It’s a leap of faith at what they’re charging for these mufflers. Also, if you don’t care for the sound, db, or performance hit you get to weld the collector and tailpipes back on that you previously cut off to install the Borla.
At least with the Gibson mufflers, you clamp on aft of the continuous 4” pipe segment, you can remove both in 10 mins if you want open headers, and they’re much more affordable and they boast 304 stainless steel throughout.
Today I’m having delivered ChemicalGuys 2 disk 4” header insert. Yes, it will impede the gas flow some, but I’m willing to do that in order to reduce my db in a cost effective manner. It’s a gamble whether the compromise will be acceptable but it’s $130 I’m willing to wager. If it doesn’t fly then I’m buying the Gibsons.
Wet pipes don’t interest me. I have black Basset twisties that love heat as does the exhaust gas in the velocity sense.
What the hell just happened? Oh yeah, I had a second cup of coffee!
Devilman
Well-known member
Devilman
Well-known member
Fuggin Coleto Creek comes to mind... there are others discussed here in the past, but not sure any I've ever been to
Devilman
Well-known member
I'm not sure there is a good way to substantially reduce noise with an insert unfortunately. The Bassett baffles I used in the past took the edge off I guess you'd say, exhaust didn't sound as crisp if that makes sense. But may be enough to keep the five-0 off yer back. You can research here, there was some pretty good discussion of this topic back in the day. It seemed like most interactions with the wardens regarding noise, if you had something in there, it was like, "Well, at least you're trying" and that'd be that lol
That said, I still have my baffles. I'd say you'd be welcome to try them, but I don't think we're making it to this Plowmans deal coming up so not of much help.
Whaler
Member
What kind of inserts do you have available?I'm not sure there is a good way to substantially reduce noise with an insert unfortunately. The Bassett baffles I used in the past took the edge off I guess you'd say, exhaust didn't sound as crisp if that makes sense. But may be enough to keep the five-0 off yer back. You can research here, there was some pretty good discussion of this topic back in the day. It seemed like most interactions with the wardens regarding noise, if you had something in there, it was like, "Well, at least you're trying" and that'd be that lol
That said, I still have my baffles. I'd say you'd be welcome to try them, but I don't think we're making it to this Plowmans deal coming up so not of much help.
Devilman
Well-known member
They are the Bassett header baffles. Look kinda like an auger inside...
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Devilman
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Done
