The short runner length of most aftermarket manifolds helps increase peak horsepower, while a longer, factory runner will produce better torque.

I will never switch to a short runner manifold because Im not willing to give up that much driveability just for a hp figure.

The only thing I would do to it is, port match and then have it extrude-honed.

Be careful to use a gasket that fits the ports on head perfectly.

Cheapo gaskets dont fit either port well, some are larger then both.

Its not necessarily about making the ports larger, its making them match that matters.

I am still questioning the decision to go with the short runner after market mani I am making more tq.

The 4.36 just gives the SR a lot of mid range power vs.

J30 3.91 that I had previously.

If I still had the 3.91 RP I would have went JWT S3s and honed the stock mani for more mid.

Yeah I try to use Nissan parts or better no auto zone crud on my car.I sure got some good info in this thread.thanx.

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Greddy Intake Manifold Sr20