Do I need a tune?

[Bugeye01WRX 7]

Hey all

 

Was just wondering if I needed a tune for the following:

 

I recently had a dyno tune done on my WRX on stock Downpipe. Got some nice gains and came out around 302bhp.

 

Been wanting to buy a Blitz Exhaust but they are over $1,000 and in looking a few of my friends recommended the following exhaust

 

https://ppdperformance.nz/products/subaru-wrx-sti-turbo-back-exhaust-with-catalytic-converter

 

Good price for a very nice sounding exhaust and even comes with Downpipe. However, I don't want to put the Downpipe on if it would cause problems. It says it is a high flow cat so I assume around 100 - 200 cells compared to the 400 or so on stock DP.

 

Is there any reason to put the Downpipe on? Or if I have had a nice tune am I better to just put the catback on?

 

Thanks!

[Loren 727]

For a road car I would just put it on and forget. If you will be going to the track, a dyno check is probably a good idea... won't need a tune I bet, just a safe check... shouldn't cost much more than the dyno bolt up cost.

[Technikhaus 744]

Yeah, you just might need to watch out for boost creep, but like Loren said, even just a check-up on the dyno to be safe.