[l0aded]

Sorry if these have been answered somewhere among the mass of threads but hopefully I can get an answer without too much search flame.

- So can an aftermarket header effectively eliminate the torque dip completely (on petrol)? I've seen many dynos from different manufacturers but some dynos still have the dip and others use e85 so it's difficult to tell. What kind of gains can one expect by adding headers to a catback with tune? Against most dynos are have other mods already on or from bone stock and such.

- How difficult is it to install headers yourself? I believe I read it wasn't too difficult but will I need to take off my existing exhaust to put on the headers and put the exhaust back on after? Will I be able to add headers if I already have another brands aftermarket exhaust? (I have Tsudo which replaces the cat with a highflow cat).

- UEL vs EL? Are the gains the same? Does the sound change significantly when adding onto an already aftermarket exhaust? I've read from other suby one sounds more rumbly or one sounds terrible. I haven't been able to find anyone with headers to listen to the sound yet so just wondering.

- Can I get a catless header and still pass emissions?

Most headers seem to be in development still but definitely my next mod if I can eliminate the torque dip even if gains are meh. Thanks in advance for clearing up my confusion.