★★★★★ 5
Effective
Size: 8" x 10" x 2"
Works great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 19, 2025
HKS Extension Kit (1418-RN005)
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
HKS Extension Kit (1418-RN005)SKU: 1418 RN005 UPC: 4957266610343 HKS Extension Kit (1418 RN005) 1989 2002 Nissan Skyline GT R RB26DETT The HKS Extension Kit (1418 RN005) separates the main turbine exhaust port from the wastegate bypass port to eliminate exhaust stream interference in stock turbine housings. Designed for 1989 2002 Nissan Skyline GT R models with RB26DETT engines, it delivers smoother exhaust flow, lower backpressure, and consistent boost pressure across the RPM
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- Fast: 2-3 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.
- To process your return/exchange, please contact us at [email protected]
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4.7 ★★★★★
Based on 605 reviews
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Product Reviews
★★★★★ 5
Fits 2021 Acura TLX
Size: 8" x 10" x 2"
Amazon garage and mfg website hadn't caught up, yet: this does fit the 2021 Acura TLX SH-AWD. No problems. New way of getting access -- pinch sides of glove box and drop off of hinge. Old way required removing an access panel.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 14, 2021
★★★★★ 5
Worth it.
Size: 8" x 10" x 2"
Super easy to install. The increased airflow is definitely noticeable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 1, 2024
★★★★★ 5
Starter
Why did you pick this product vs others?:
Good replacement.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 20, 2025
★★★★★ 5
Starter works great
Fits and works great 2005 Mercury mariner 3.0
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 29, 2025
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