This is a recommendation to consider for the core of a BT build because this is where you can fall foul of many issues and I really like good strong designs which think about future maintenance as well as assembly.
VW / Audi / Seat / Skoda - Performance Tuning has been quietly working on VAG vehicles for many years and they have an excellent manifold and dp solution and they can accommodate custom fabrications in house and quality engine upgrades as well around any install being considered.
We like designs that are well thought out and this has been the best by a long long way its nicely over-engineered which in the original traditions of older German cars is refreshing, its a 1.8T Manifold and DP solution which has been track tested as well as road tested with zero issues.
They do an external waste-gate solution but this setup is for internally waste-gated T25 based Turbos, so
GT2860,2868,2871's will fit for sure as could a few others space dependent and TSR could get the design modified for anything unusual within reason.
The kit is made up of the following...
3", 3 Piece Downpipe and cat section
Vband top, and mid DP joint to allow for ease of installation and maintenance, the split design means you can work with this lot without removing the subframe.
EGT and Lambda Bungs in the top section
100cell sports cat section - test pipe optional
Manifold - 3mm 321 grade stainless steel. All flanges are lazer cut and the welds are back purged - external gate optional
If you look at this engine shot and the pics above, look at the bolt access, there is so much space to make fitting
and maintenance easier.
The Lambda in this position is easily maintainable.
3" DP is tight but clearance is fine. (additional heat shielding is installed behind existing shielding.)
Here is a neat adapter plate for the Turbo to V-Band which means ease of maintenance and assembly for the future.
Release the V-band to get the DP out and access to all adapter bolts is much simpler.
Also if you had an unusual turbo configuration a short Vband adapter to flange is all that needs to be fabricated to adapt this setup
The Actuator is my own request to keep it turbo mounted so has been modified for the angles.
Turbo Outlet is virtually OEM positioned
Stock look is achieved by this design.
Custom 3" tip finishes up the configuration which TSR can fabricate for specific needs.
Apart from bling there is no shouting out loud.
Good design does cost but from the experiences we've had, the initial outlay is easily paid for by not having to revisit things.
If you want a quality solution then give Rob at VW / Audi / Seat / Skoda - Performance Tuning a call and they can design a package around what you want to achieve.