I was so impressed I decided to get some specs on it and post them up.
The inlet port to the upipe (exhaust manifold outlet) has a radius nearly 10mm larger than stock. The pipe tapers smoothly to the outlet (turbo inlet) where its radius is about 4mm larger than stock. The stock uppipe weighs in at about 7 - 7.5lbs and the GrimmSpeed piece is about 3 lbs lighter.
- thicker flanges
- ceramic coating for to keep the heat in
- mandrel bent pipe vs. stock crush bends
- ~20mm diameter larger inlet (94.56mm) & ~8mm larger outlet (86.76mm)
- 3lbs weight savings
If you're on the fence about this part hopefully this info plus the vendor info pushes you over the edge. It's a solidly built piece and you won't be disappointed.
If you're in Canada, support Touge Tuning. I've had nothing but excellent experiences with them and from what I can tell their prices can't be beat!