Invidia - G5 Titan Titanium Cat Back R400  - (WRX/STi Sedan 11-21)
Invidia

Invidia - G5 Titan Titanium Cat Back R400 - (WRX/STi Sedan 11-21)

In the rangePart no. HS15STI5TG4ST
Claimed gain
17hp / 26ft-lb
Pipe diameter
80mm
Material
Full titanium
Fits
GR-GV Impreza WRX STI (2008–2014), VA WRX / STI (2014–2021)
Category
Intake & exhaust
All 10 specifications ↓

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  • Fitment is confirmed, not guessed

    A chassis is listed only where the part is on one of our cars or on the manufacturer’s own application list.

  • Some of this is on our cars

    Parts marked On our cars are ones we race. Those descriptions are written from running them, not from a brochure.

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Specifications

Brand
Invidia
Part number
HS15STI5TG4ST
Claimed gain
17hp / 26ft-lb
Pipe diameter
80mm
Material
Full titanium
Flanges
Titanium
Construction
Mandrel bent, machine welded
Tips
Quad straight-cut, titanium coloured
Fits
GR-GV Impreza WRX STI (2008–2014), VA WRX / STI (2014–2021)
Category
Intake & exhaust

Figures as published for this part; fitment is only what we have confirmed. Check critical dimensions against your car before ordering.

About this part

Invidia's G5 Titan cat-back exhaust (HS15STI5TG4ST) is the full-titanium version of the R400, fitting WRX and STI sedans from 2011 to 2021 across the GR-GV and VA generations. Piping and flanges are both titanium, mandrel-bent and machine-welded, running 80mm in diameter and finishing in quad straight-cut, titanium-coloured tips. Invidia quotes a 17hp and 26ft-lb torque gain for the system, built on the same straight-through design as the rest of the range, trading backpressure for a harder edge to the exhaust note.

Fitment

Confirmed for the chassis below. We list a chassis only where the part is on one of our cars or on the manufacturer’s own application list.

More like this: GR-GV intake and exhaust parts (101) · VA intake and exhaust parts (116)

We have not run this part ourselves — the ones we have are marked on our cars.