GRS
I have been using Grahams items since he started many years ago, not once have i had any type of problem.
No Overheating issues
Easy to fit items
Custom made for any requirements
No boost drop or leaking issues.
I have also sent bent, damaged items that have been in crashes etc.. back to GRS to be fixed back to the high standrad they once were.
All round the GRS items are better than the other choices value for money and for results IMO
Regards
A pic of the Largest S1 Intercooler:-