2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTrack day silencer
Reported or suspected cause
noise limits
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause · Original poster
The problem is the noise limits that are too tight.
Leading evidence: 'noise limits' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'noise limits' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Recommend engines up' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
They are ideal for use after an inline muffler, but they can also be used on a straight-through system.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The 4" diffuser is recommended for engines up to 250 HP or a 4.0L engine.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
They are ideal for use after an inline muffler, but they can also be used on a straight-through system.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Use a diffuser on each pipe of a dual-exit exhaust for engines up to 500 HP.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
2 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have a problem here in Finland with my 996 C2, 1998.
Local track silent days are too hard for me to enter. The problem is the noise limits that are too tight. Funny thing that cars and bikes straight out of a shop are too loud.
Has anybody idea of DecibelDevil type silencer that fits oval tailpipes?
One option is to make round tailpipes with DecibelDevils and welded 90 degree downpipe to them.
Supertrapp?
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SuperTrapp 4" Diffuser Disc Only for 2" Pipe
Click for a larger picture of SuperTrapp 4" Diffuser Disc Only for 2" Pipe
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Brand: SuperTrapp Industries
The patented radial diffuser design of SuperTrapp mufflers allow you to tune your exhaust by adding or removing diffuser discs. Each disc provides a new escape route for exhaust gas (and noise). Adding more discs lowers back pressure while increasing noise. Fewer discs decreases noise while increasing back pressure. You can gain a measureable performance advantage by wave tuning your engine and carburetion to produce the best power band for any track. In certain racing classes where carb tuning is restricted, SuperTrapp diffusers have become standard equipment.
The Diffuser Disc Only series gives you the tunability of the diffuser discs without the weight and bulk of a glasspack muffler. They are ideal for use after an inline muffler, but they can also be used on a straight-through system. The 4" diffuser is recommended for engines up to 250 HP or a 4.0L engine. Use a diffuser on each pipe of a dual-exit exhaust for engines up to 500 HP.
This kit includes a steel weld-on flange, 12 diffuser discs, a polished end cap, and 6 disc bolts and nuts. Simply weld the flange to your 2" OD exhaust pipe and then bolt the discs and end cap to the flange. Experiment with different numbers of diffuser discs until you find the right balance of power, torque, and sound levels.
5.0
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ST-444-2003
Condition: New
$90.99
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SuperTrapp Diffuser Only Series
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1/10/2016
5.0
Great to deal with.
By rg
from Orlando, FL
Verified Buyer
Comments about SuperTrapp 4" Diffuser Disc Only for 2" Pipe:
Great product, great price, fast shipping.
BOTTOM LINE Yes, I would recommend this to a friend
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