Vincent Ward Posted July 3, 2021 Share Posted July 3, 2021 I have just ordered a 420 R. We can tinker with the specs until November. Question - how many track days around the country have decibel limits? I'm trying to decide whether or not to have a track day exhaust on it. Thanks in advance Vince Link to comment Share on other sites More sharing options...
ScottR400D Posted July 3, 2021 Share Posted July 3, 2021 Most do as far as I know. 105/108 seem typical. Having said that, the spec of the car makes a difference. My R400D with RBTBs has a standard exhaust and I am below 105, though it's an SV so the intake is all under the hood. Link to comment Share on other sites More sharing options...
Mrb00ns Posted July 3, 2021 Share Posted July 3, 2021 Static most are low 100s. You should be ok with a stock car. On the track some go as low as 87 I think, generally you can find out where they are and ease off if you need to. Link to comment Share on other sites More sharing options...
ChrisC Posted July 3, 2021 Share Posted July 3, 2021 A stock 420r must record under 98db static or it won't pass IVA. Static isn't generally the problem. I am more worried about drive by, and that has a load of factors from microphone position, gear used etc etc. I believe a 420R can cause problems at brands for example. Link to comment Share on other sites More sharing options...
Mrb00ns Posted July 3, 2021 Share Posted July 3, 2021 I was at brands recently and the friendly tester told me I might just want to ease off slightly just by the bridge going up pilgrims into druids... Link to comment Share on other sites More sharing options...
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