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Ships within 48 hours · Estimated delivery Sep 24 - Sep 29
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Description
GDP Air-Boss VP Intake Plenum & Grid Heater Delete Kit 98.5-02 CumminsEGT's running too high? Can't use all of the fuel you have available? The Air Boss VP plenum gives the largest bolt on flow increase possible short of milling the cast plenum off the head and installing a fabricated intake plenum. The Air Boss VP isn't just a replacement flat aluminum plate as seen in other designs. The Air Boss VP is a true, elevated plate designed to flow as much air as possible to cylinders 4, 5, and 6. We've all have seen the head
EGT's running too high? Can't use all of the fuel you have available? The Air-Boss VP plenum gives the largest bolt-on flow increase possible short of milling the cast plenum off the head and installing a fabricated intake plenum. The Air-Boss VP isn't just a replacement flat aluminum plate as seen in other designs. The Air-Boss VP is a true, elevated plate designed to flow as much air as possible to cylinders 4, 5, and 6. We've all have seen the head gasket failures between the hottest running #5 and #6 cylinders. With our plate design we open up the plenum area to the starving rear cylinder by a full 20%. By increasing airflow to the rear cylinders we reduce EGT's and allow you to run even higher fueling levels.The Air-Boss VP plenum kit also includes a shortened grid heater delete block to maintain the factory IC piping to intake manifold connection geometry . Maintaining this geometry makes the Air-Boss VP compatible with ALL aftermarket intake manifolds and the stock mounting hardware.
GRID HEATER OPTIONS:
- The standard Air-Boss VP kit includes a custom height grid heater delete block.
- For colder climates we now offer the Air-Boss VP with a grid heater option. This option uses the factory grid heater (no delete included) and custom length stainless steel studs to accommodate the increased plenum height of the Air-Boss VP.
- For customers that want to swap back and forth between the heater and delete block we offer both item in one package.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
Good product
Color: gray
Nice fit. Easy yo install.
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Reviewed in the United States on March 25, 2026
★★★★★ 4
Exact replacements for ‘25 Forester air/cabin filters
Color: gray
Exact replacement set for ‘25 Subaru Forester. Reasonable cost, quality seems OK. Easy install.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
Work Great
Color: gray
Works well in my car good quality and the cost is not bad compared to the other brands. Easy to install.
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Reviewed in the United States on April 8, 2026
★★★★★ 5
Dealer wanted $200, Changed them in 5 min
Color: gray
Good quality, saved a lot of money over having a dealer or mechanic change them.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
As good as the original
Color: gray
Perfect fit engine air filter and cabin air filter.
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Reviewed in the United States on January 9, 2026