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Performance Parts for '01 Seville SLS


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You said besides exhaust, but Corsa makes a cat-back performance exhaust for th 2001 SLS here: http://www.corsaperf.com/devilleseville.htm

K&N makes a drop-in panel filter here:

http://www.knfilters.com/search/product.aspx?Prod=33-2063-1

The northstar is sensitive to intake air temperature, and the stock system is designed to be a cold air intake system. I would avoid any cone type setup that did not prevent the intake of under hood air due to the packaging. Several Readers have reported no benefit in their testing from a cone intake setup on the Northstar. Greg reported and showed dyno results of some improvements on his 4L Aurora.

I have often thought that with GM shared components you might be able to find a pulley set from other engines that would work with the Northstar. I do not know of any however. The northstar cooling system is fairly well balanced, so going smaller on the water pump pulley would be something I'd stay away from.

No one makes custom cams for the northstar that will work with the stock PCM (computer).

No one makes a new calibration (program, chip) for the PCM that I know of. zindustries once had a OBD-II product apparently for a top speed race, but no longer makes it.

Mark_99STS has many mods on his STS, including a piggyback computer module and a turbo. He got a high-rpm torque converter, had a custom limited slip differential custom made, got a local shop to port and polish the heads, and added the turbo with intercooler. So there are more things you can do, but none of them appear to be inexpensive.

Bruce

2023 Cadillac CT4-V Blackwing

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You said besides exhaust, but Corsa makes a cat-back performance exhaust for th 2001 SLS here: http://www.corsaperf.com/devilleseville.htm

K&N makes a drop-in panel filter here:

http://www.knfilters.com/search/product.aspx?Prod=33-2063-1

The northstar is sensitive to intake air temperature, and the stock system is designed to be a cold air intake system. I would avoid any cone type setup that did not prevent the intake of under hood air due to the packaging. Several Readers have reported no benefit in their testing from a cone intake setup on the Northstar. Greg reported and showed dyno results of some improvements on his 4L Aurora.

I have often thought that with GM shared components you might be able to find a pulley set from other engines that would work with the Northstar. I do not know of any however. The northstar cooling system is fairly well balanced, so going smaller on the water pump pulley would be something I'd stay away from.

No one makes custom cams for the northstar that will work with the stock PCM (computer).

No one makes a new calibration (program, chip) for the PCM that I know of. zindustries once had a OBD-II product apparently for a top speed race, but no longer makes it.

Mark_99STS has many mods on his STS, including a piggyback computer module and a turbo. He got a high-rpm torque converter, had a custom limited slip differential custom made, got a local shop to port and polish the heads, and added the turbo with intercooler. So there are more things you can do, but none of them appear to be inexpensive.

I was looking and only saw One body kit... do you know of any others? otherwise I will just have to design my own again.

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I put a cone filter on my '97 SLS and would not recommend it. More details below:

http://www.jnjhome.net/cadillac/filter.htm

There are a lot of negative posts here regarding K&N style air filters. Enough of us have "lived and learned".

Jason(2001 STS, White Diamond)

"When you turn your car on...does it return the favor?"

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