Those stromberg carbs are great when they are working, and awful when they aren't. Make sure your carb is doing everything it should.

If you're in the US, your car will have some annoying solenoids and emissions related stuff attached to the carb. Make sure all of those relays and solenoids are working as they should.

Make sure you've got proper non-resistor plugs in it, and quality set of wires.

Make sure you've got all the power you started with before you go looking for more.

The way the M115 intake and exhaust manifolds bolt together, I think it would be tough to improve on the exhaust without extensive work. I have a spare 190SL header and it will bolt up to the M115, but it will not clear the frame rail in a W115.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

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