While it is a fundamentally bad idea*, EGR isn't as horrible on gas engines as it is on a diesel. A new car also has the advantage having 30 less years of wear and tear on it. I'm not telling you to run out and buy a new car, but these are things to think about.

*I know it reduces peak combustion temperatures in order to reduce NOx emissions and save the environment. My position on that is a quote from the Right Honourable Sir Jeremy Clarkson, "I'm very aware of the environment, and I'm still not interested in it."

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.