My stock turbo (2000 V70 XC) will need to be replaced soon. It has a slow coolant leak not resolved by new seals or tightened fittings. What are my options for a better-performing turbo that won't burn up the engine (approx 90,000 miles)?

What type of ancillary upgrades would be required to facilitate proposed turbo (assuming intake and exhaust)?

Plus, I'd like to convert my single pipe to a dual exhaust, but all I can find offered is Eurosport's for approx $700. Is this a quality assembly?

Any thoughts on my situation are welcomed.