Dyno tune after exhaust mod?
 

So I recently inquired Kaizen Tuning about getting an exhaust mod on my Z. They recommend me to do a dyno tune after installation of the new exhaust. Is that necessary or better to actually do it? Thanks

Do it after all your mods ,that way you will get the most out of it.

If it is just a exhaust mod then you don't really need it but it does wake the car up.

How much of the exhaust system are you planning to modify?
Other members recommended I get a dyno tune after I replaced the intakes and the ENTIRE exhaust system.

I'm looking to get the HKS hi-power (I assume it's the whole exhaust system?)

It is a Cat Back system,power up about 10 Hp.

I thought that it made like 15-18.

Somewhere between 10-15 HP increase at peak with a dyno tune have been reported. Low and mid range torque improvement by about 10-25 lb-ft, which really makes a difference on the butt dyno too. The car feels more responsive and pulls harder.