2.5" exhaust to 3" - re-map needed or not?
2.5" exhaust to 3" - re-map needed or not?
my hawk sti has been mapped with a 3" decat downpipe with a 2.5 center section and vortex backbox. i wish to go 3" all the way,would it need a map tweak or not?
Scooby Regular
Joined: Oct 2014
Posts: 6,082
Likes: 131
From: P1234x
I’ve changed from 2.5 then 2.75 and now a true 3” item also changed numerous amounts of exhausts on other Subaru’s never needed a map
a few people I know have gone for a so called fruitless tweak we’re its made no difference on the drive back to when they took it....from the mappers unless you are taking the downpipe cat off and deccatting the centre piece and back box have no effect on the map through experience
a few people I know have gone for a so called fruitless tweak we’re its made no difference on the drive back to when they took it....from the mappers unless you are taking the downpipe cat off and deccatting the centre piece and back box have no effect on the map through experience
I’ve changed from 2.5 then 2.75 and now a true 3” item also changed numerous amounts of exhausts on other Subaru’s never needed a map
a few people I know have gone for a so called fruitless tweak we’re its made no difference on the drive back to when they took it....from the mappers unless you are taking the downpipe cat off and deccatting the centre piece and back box have no effect on the map through experience
a few people I know have gone for a so called fruitless tweak we’re its made no difference on the drive back to when they took it....from the mappers unless you are taking the downpipe cat off and deccatting the centre piece and back box have no effect on the map through experience
Scooby Regular
Joined: Oct 2014
Posts: 6,082
Likes: 131
From: P1234x
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