[UltraMagneticAL]

anyone measure the dB levels of their exhaust and DP combos? Some tracks have max sound limits - ie Laguna Seca has a limit of 92dB @ 50ft.

[Fabspeed Motorsport]

Originally Posted by UltraMagneticAL

anyone measure the dB levels of their exhaust and DP combos? Some tracks have max sound limits - ie Laguna Seca has a limit of 92dB @ 50ft.

It's tough to compare other track sound limits to places like Laguna and Limerock. There are factory cars that don't even pass at those tracks.

dB readings are tough to judge because there is are so many variables into how the readings are calculated. But a good rule of thumb is that a catted downpipe is going to get you 80-85% of the same sound as a catless setup.

[UltraMagneticAL]

Originally Posted by Fabspeed Motorsport

It's tough to compare other track sound limits to places like Laguna and Limerock. There are factory cars that don't even pass at those tracks.

dB readings are tough to judge because there is are so many variables into how the readings are calculated. But a good rule of thumb is that a catted downpipe is going to get you 80-85% of the same sound as a catless setup.

hmmm not that big of a difference. catless is looking more and more enticing lol

[Fabspeed Motorsport]

Originally Posted by UltraMagneticAL

hmmm not that big of a difference. catless is looking more and more enticing lol

Keep in mind that with a catless downpipe you need to tune for it. Yes, you can install O2 fakers to trick the ECU into thinking there is a cat there but that doesn't mean it is necessarily running healthy. I would never go catless without a tune, especially on a turbo car.

Also, catless will produce more exhaust smell and soot on the rear bumper. What our catted downpipe (Sport Cat) provides is a simple, reliable bolt-on install that produces great power and sound. All while be CEL-free, no tuning required, clean rear bumper, and little-to-no smell.

[LBBDrew]

Be careful if Laguna Seca is your preferred track. There is zero wiggle room/flexibility there. They will Black Flag you immediately if your car is over the DB max (3 Black Flags and you are done for the day). Valvetronic exhaust would be ideal here. For reference, stock 458 and axle-back 991 gt3 are still way too loud.

[UltraMagneticAL]

Originally Posted by Fabspeed Motorsport

Keep in mind that with a catless downpipe you need to tune for it. Yes, you can install O2 fakers to trick the ECU into thinking there is a cat there but that doesn't mean it is necessarily running healthy. I would never go catless without a tune, especially on a turbo car.

Also, catless will produce more exhaust smell and soot on the rear bumper. What our catted downpipe (Sport Cat) provides is a simple, reliable bolt-on install that produces great power and sound. All while be CEL-free, no tuning required, clean rear bumper, and little-to-no smell.

was going to get it tuned anyways, so CEL isn't an issue.

Originally Posted by LBBDrew

Be careful if Laguna Seca is your preferred track. There is zero wiggle room/flexibility there. They will Black Flag you immediately if your car is over the DB max (3 Black Flags and you are done for the day). Valvetronic exhaust would be ideal here. For reference, stock 458 and axle-back 991 gt3 are still way too loud.

Laguna Seca is only up once in the schedule i think. Most of the track days will be down here in SoCal. i already have Akra which isn't that loud on stock DP. maybe getting the sound kit w/ the catless dp will need to be in the plans so i can keep the valves closed in sport mode

[mike@x-ph.com]

Originally Posted by UltraMagneticAL

was going to get it tuned anyways, so CEL isn't an issue.

If the car has a stage 2 tune and fuel smell is not an issue. Go with tune + catless