Best in 7 days
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Ships within 48 hours · Estimated delivery Jun 18 - Jun 23
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Description
Nitrous Express 4150 Assassin Plate Pro Power Nitrous Kit (100-500HP) with 12lb Carbon BottleAssassinate the competition with the Assassin plate system. The Assassin is the most technically advanced single stage plate ever designed. The CNC machined design integrates the nitrous and fuel discharge ports into the outer perimeter. The Assassin offers a unique perimeter spray pattern that assures perfect nitrous fuel distribution. Which in turn solves the problems commonly found on single plane manifolds, particularly small and big block Fords.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.6 ★★★★★
Based on 2038 reviews
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Product Reviews
★★★★★ 5
WHAT A MARVELOUS AIR FILTER.
Style: Two Pieces
SO FAR THESE FILTERS ARE MARVELOUS. THESE FILTERS ARE WELL MADE ESPECIALLY FOR THE PRICE. LOOKS LIKE A SIGNIFICANT $$$$ SAVINGS. TMP.
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Reviewed in the United States on March 9, 2026
★★★★★ 4
OEM quality
Style: One Piece
Good quality replacement. Perfect fit
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Reviewed in the United States on April 9, 2025
★★★★★ 5
Exact fit, no trimming needed
Style: One Piece
Ordered this for my Ford F-150 and it dropped right into the airbox perfectly — same dimensions as the OEM filter, same end seals, same fit. No gaps, no air bypass around the edges. Clean swap in under five minutes. Engine runs smooth and the price is unbeatable.
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Reviewed in the United States on May 11, 2026
★★★★★ 5
very nice product
Style: Two Pieces
It fits perfectly. Easy to install.
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Reviewed in the United States on January 15, 2026
★★★★★ 5
Good Product and Price.
Style: One Piece
Great filter, fits perfectly. Very close to OEM fit. I have 2015 Mercedes E350, fit perfectly.
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Reviewed in the United States on December 3, 2025
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