The NAPREC Big Bore Throttle Body are designed, and machined to increase high rpm power and throttle response.
Features
Available Big Bore Processing for many engines (including):
- 2JZ, 1JZ, 4A, 3S, 2ZZ,
- RB, SR, VG, VQ, VH
- B16, B18, K20/24, F, H, C
- 4G63,
- EJ20, EJ25
- 13B-T, 13B-REW
- M16A.
Sample RB26 Specs:
- Larger Diameter valves:
- OEM: 45mm
- NAPREC: 49mm
Notes
- The NAPREC Big Bore Throttle Body is an upgraded part, and requires an OEM part to be sent into our office. You can send your factory Throttle Body into our office or have a brand New OEM Throttle Body provided.
- If you do not see your part or your engine listed, please make an enquiry. We are happy to answer.
We ship to the United States and 150 other countries.
Japan Post EMS & ePacket, FedEx, DHL and more.
| Vehicle | Part | Diameter | Butterfly | Price | Order | ||
|---|---|---|---|---|---|---|---|
| SR20DET | |||||||
| 180SX - RS13 SR20DET | for GReddy Plenum | 80 mm | | ||||
| SR20DET | |||||||
| Silvia - S13 SR20DET | for GReddy Plenum | 80 mm | | ||||
| SR20DET | |||||||
| Silvia - S14 SR20DET | for GReddy Plenum | 80 mm | | ||||
| SR20DET | |||||||
| Silvia - S15 SR20DET | for GReddy Plenum | 80 mm | | ||||
| DRAG-100 | |||||||
| Skyline GT-R - BNR32 | 100mm throttle valve - fitting flange as the Q45 90mm throttle valve - Fits Top Secret Surge Tank | 90 mm | 100 mm | | |||
| RB26-49mm | |||||||
| Skyline GT-R - BNR32 | Expanded Bore Throttle Body | 49 mm | | | |||
| RB26 Throttle Body Gaskets | |||||||
| Expanded Bore Throttle Body - Gaskets, 50mm (x6) Optional | |||||||
| DRAG-100 | |||||||
| Skyline GT-R - BCNR33 | 100mm throttle valve - fitting flange as the Q45 90mm throttle valve - Fits Top Secret Surge Tank | 90 mm | 100 mm | | |||
| RB26-49mm | |||||||
| Skyline GT-R - BCNR33 | Expanded Bore Throttle Body | 49 mm | | | |||
| RB26 Throttle Body Gaskets | |||||||
| Expanded Bore Throttle Body - Gaskets, 50mm (x6) Optional | |||||||
| DRAG-100 | |||||||
| Skyline GT-R - BNR34 | 100mm throttle valve - fitting flange as the Q45 90mm throttle valve - Fits Top Secret Surge Tank | 90 mm | 100 mm | | |||
| RB26-49mm | |||||||
| Skyline GT-R - BNR34 | Expanded Bore Throttle Body | 49 mm | | | |||
| RB26 Throttle Body Gaskets | |||||||
| Expanded Bore Throttle Body - Gaskets, 50mm (x6) Optional | |||||||
Naprec is an engine parts and machining specialist in Hachioji, Tokyo, set up in April 1997, which moved from Fuchu to Hachioji in 1999. Naprec makes tuning parts for car and motorcycle engines and does engine machining, overhaul and surface treatment, with parts for engines such as the Nissan RB26, RB25 and SR20, Toyota 2JZ, 1JZ and 4A-G, and Mitsubishi 4G63.
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About NENGUN
Since the year 2000, NENGUN has supplied over 500,000 parts direct from Fukuoka, Japan to 170 countries worldwide. If you have any questions, our experienced and friendly customer service team is always happy to help, please send us an enquiry.











