Exhaust pipe gasket is normally not included in either overhaul set gasket or head set gasket, and the local exhaust pipe gasket maker normally using normal asbestos material for this kind of gasket, for those high performance exhuast system like those in GTR R35, this kind of material we not be consider at all.
And let see what is the few statement from wikipedia that made on the GTR exhaust system,
The revised GT-R (2011 model year, 2012 model year for the US) features an engine with revised mapping, changes to valve timing, larger inlets and a revised exhaust system which boosts rated power to 530 bhp and 612Nm of torque from 3200 to 6000rpm.
The GT-R SpecV is powered by the standard twin-turbo 3,799 cc (3.8 L; 231.8 cu in) V6 with no increase in horsepower. A new high gear boost controller that allows a temporary increase in boost pressure to the IHI twin turbochargers, now larger than those on the standard GT-R, should deliver more torque in mid to high-range revs. Other mechanical changes include a titanium exhaust, reworked suspension, carbon ceramic brakes, and 20-inch (510 mm) NISMO wheels. Overall weight is decreased by 132 lb (60 kg) over the standard GT-R.
In August 2008, Nissan's official motorsport and tuning arm Nismo announced the "Club Sport" tuning package for the GT-R . The package, which is also fitted to the SpecV, includes Bilstein Damptronic compatible dampers, 20" forged aluminum wheels from Rays Engineering, Bridgestone run-flat tires, Recaro carbon fiber-shelled bucket seats, a titanium exhaust, and a revised rear diffuser with an added cooling duct. The package is supported by a warranty and saves over 20kg.
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