I have the chance to buy a helix catless downpipe and an hks hi power exhaust for $350.... I had a couple of questions that I was hoping somebody could help me with. First of all wondering if these two are compatible? And also wondering about the quality of the helix down pipe and how it compares to the invidia. I heard that it being catless will cause me to have my check engine light on... Not sure of that's true. If so what could I do to fix this. Just hoping for some general knoledge of the two. If anyone could tell me what they think About this choice for my 06 wrx I would appreciate it. Thank you.
Well the HKS exhaust is a full/true 3 inch exhaust the and the Helix DP is 3 inches so....yes it will fit. The only thing I would recommend is some stronger/firmer exhaust hangers (i.e. Kartboy) so your big fartcan exhaust won't rattle around. Also, FYI that HKS exhaust is LOUD.
As for the quality of the Helix being as good as Invidia, probably not as Invidia is one of the best. But, it is a DP and it should be fine (plus it is a great deal at $350). I would just give the items a good look over and make sure there are no dents, rust, or damaged/weakend areas. Also, make sure to get NEW gaskets.