SS #670 Modifications:
Airbox lid

[SLP Engineering]

I didn't install an aftermarket airbox lid at first but eventually got the SLP OEM airbox lid (11030) which is part of SLP's High Flow Induction System, first offered in mid 2002. When combined with SLP's dual-dual or center-mount exhaust systems, this lid produces 20 HP more than an SS without it. Since SS #670 has a SLP dual-dual exhaust, installing the SLP OEM lid should be good for at least 10 HP.

[Factory OEM airbox lid] [SLP OEM airbox lid]
Factory OEM airbox lid SLP OEM airbox lid

Note that the factory lid has Helmholtz resonator boxes built into the intake tube. These are designed to cancel sound coming from the engine via the airbox.

The SLP OEM lid is injection molded (just like the stock part). Most aftermarket lids are vacuum molded. I think this is why some people have trouble getting aftermarket lids to seat and seal properly.

[Factory OEM airbox lid] [SLP OEM airbox lid]
[Factory OEM airbox lid] [SLP OEM airbox lid]
Factory OEM airbox lid SLP OEM airbox lid

The SLP lid comes with the same fan/coolant/refrigerant warning label (GM 10308344) found on the stock lid as well as some hose and plastic fittings to extend the secondary AIR system to its new connection on the lid.

[Donaldson Blackwing]

The SLP lid also came with a Donaldson high flow disposable paper air filter (SLP 10894) which SLP said flows better than a K&N reusable filter. The Donaldson disposable filter can also be used with the factory OEM airbox lid. Unfortunately, SLP no longer stocks these filters and Donaldson no longer makes them.

[Donaldson and A/C Delco air filters]
Donaldson and A/C Delco filters

According to the Donaldson Cross Reference Page, the direct replacement air filter for the stock A/C A917C filter is the Donaldson P536427. I'm told this part was made in Mexico for Donaldson by Luber-finer, a division of Champion Laboratories. It's a standard duty filter like the stock A/C unit. The SLP high flow filter is the Donaldson P543298 and was made in house. It was only sold through SLP and GM dealers.

Installation notes


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[SS #670 Mods: Sway bars] [SS #670 Mods: Shocks and struts] [SS #670 Mods: Springs] [SS #670 Mods: Panhard bar] [SS #670 Mods: Lower control arms] [SS #670 Mods: Subframe connectors] [SS #670 Mods: Adjustable torque arm]
[SS #670 Mods: Differential] [SS #670 Mods: ZR1 wheels] [SS #670 Mods: Shock tower brace] [SS #670 Mods: Brakes] [SS #670 Mods: Hurst billet plus shifter] [SS #670 Mods: Heel/Toe throttle extension plate] [SS #670 Mods: Driveshaft safety loop]
[SS #670 Mods: Radiator] [SS #670 Mods: Oil cooler]
[SS #670 Mods: Differential vent tube] [SS #670 Mods: Shiftlight] [SS #670 Mods: Airbox lid] [SS #670 Mods: Polyurethane bushings]
[SS #670 Mods: Auto Meter gauge pod] [SS #670 Mods: Disable CAGS] [SS #670 Mods: Disable daytime running lights]

[SS #670 Mods: EFILive] [SS #670 Mods: LS1_Edit]
[SS #670 Mods: Battery] [SS #670 Mods: Valentine One remote display] [SS #670 Mods: Headlights] [SS #670 Mods: iPod integration] [SS #670 Mods: LEDs] [SS #670 Mods: Cellular phone] [SS #670 Mods: Zaino Bros' show car polish]

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Craig Leres