toyota gr yaris gpf delete this is an additional item for people that maybe want a bit more noise
and some small power gains over an opf back exhaust removing the opf or gpf or the secondary
cap for australian spec cars will definitely make the exhaust louder the opf is quite restrictive
and will free up a few horsepower not many um we don't have any uh kind of uh dyno print apps to
back that up one of the reasons behind that is that the gi yaris is notoriously hard to dyno
um and the other is that we simply don't need to you the more exhaust restrictions you remove
the more free-flowing the exhaust will get the more power the engine can make
so again we're not talking about big chunks of horsepower but all these little gains do add up
so it's fully mandrel bent tig welded as you would expect from us
fully compatible with the oe cat and with the oe catback or opf back
so on the stock exhaust exhaust setup the the cat hangs off the turbo really small cap and then on
the end of that is what we call the opf pipe now for our aftermarket version we split it into two
so we've got the the flange section which goes onto the original graphite gasket little graphite
cone seal gasket that bolts onto the cap and then our opf pipe slips inside there the reason we've
done it in two like this is so that in the future if we have any customers that want to upgrade to a
d-cap we can go to a d-cap with a full three-inch ball joint the stock cat has a really small joint
spam 55 millimeters from memory so it is quite restrictive in terms of flow
so by removing that joint we're really opening up the exhaust and i'd be surprised if anybody
ever really wants to remove the cat for a decaf and keep the secondary opf in place it's um not
the most common choice i don't think so that's the reason we've we've gone to doing it that way
that way the opf pipe is fully compatible with the stock exhaust and compatible with our own
downpipe as well we've got two o2 sensor bosses in here the the reason for that is
this is where the original o2 sensor boss is so this is the one that's checking that the
primary cat is doing a good job so the computer is constantly looking for how clean the exhaust gas
is and it'll know if you've removed the cat but it won't know if you've removed the opf pipe because
there's no sensor after the opf we add a secondary boss in here and this is purely for if we ever
had a sports cat in here if we had a sports cat in here we can move the secondary sensor down to here
and that should stop us getting the check engine light which um you know most people
won't really want if they go into the cost of having a sports cat it keeps the car legal and
emissions friendly and even though the cat is more free-flowing we'll by putting this sensor in here
we'll keep that light off the dashboard we've got tig welded hanger brackets on again as per usual
really with our hangar bullets to keep the bushes nicely located all fully machined these are nice
stainless steel items that are machined and then welded on the end of the uh bent hanger bars and
then on the end we've got the two bolt flange that suits the oe cat-back or our own cat-back exhausts
it should be suitable for all other aftermarket exhausts as well and we supply a gasket for that
along with the nuts and bolts to go with it so again stainless steel bolts and washers and copper
nuts so the adapter for the oe cat is quite a specific fit so it has a graphite cone flange
and we then form a cone which fits that and we can weld that to the inside of the flange we
don't need to weld all the way around because the gas seal isn't actually takes place inside here
the reason we don't weld all the way around there is we don't want to induce any warpage
into this flange that we don't need to we don't need to weld all the way around there so we don't
so it's perfectly normal that it looks like that all these kind of bolt holes are doing is holding
that pipe up there onto that graphite cone fully tig welding and back purged again you can see the
nice weld showing through onto the inside just the same as the outside and then we include a
mykolor stainless steel clamp for that section as well so that just makes it nice and easy to fit
so we offer this with no cat with a sports cat 300 cell cat which uh is emissions compliant
the a few people will question why we offer this with a cat and it's mainly because if you remove
the down pipe the most sensible place to put the cat is a little bit further down the car
you want to put it a bit further down the car because then it remains as uh you know as
free-flowing as possible to put it further up the car would be a compromise this is about as early
as we can fit the cat before we end up having to compromise on the size and shape of where it fits
so this is the best location for the cat and then we also offer a silencer that can
fit where a cat would go as well for people that maybe don't want a cat but don't want
the the kind of extra noise that'll come with a down pipe and an opf delete and then some people
may just choose to remove the opf and have a cat there in place so they get the kind of performance
benefits of the opf delete while leaving the primary cat in place but have a small silencer
in there to try and knock out a few of those decibels that we'll gain through removing that opf
bye