BBK 1537 Twin 52mm Throttle Body
- Twin 52 mm bores, Power Plus series
- GM tuned port 305 and 350, 1985-1992 engines
- 7-12 HP gain claimed, depends on vehicle and application
- CNC machined 356 aluminum castings
- 9 x 6 x 4 inches product dimensions
- 4 pounds item weight
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A twin-bore aluminum throttle body for GM tuned port engines of the listed years. Use it only on those engines, and note that no flow data backs the horsepower range.
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ASIN: B000CITCZ4Model: 1537Category: Throttle Bodies
Overview
On a GM tuned port engine of the years in the listing, this BBK throttle body replaces the factory unit with a twin-bore aluminum casting. The maker says its CNC machining gives OEM quality and fit.
BBK pitches this Power Plus body as a bolt-in way to change airflow on the named GM engines. The listing gives no kit contents or warranty terms, so the buyer relies on the part number and the vehicle list.
Who it's for
A restorer or tuner working on a listed tuned port GM engine can match this unit by part number and description. Owners of other engines should not assume cross compatibility, and anyone needing documented warranty terms should ask the seller.
Pros and cons
- CNC machined aluminum
- Named GM tuned port fitment
- Warranty terms not listed
- Included parts not stated
- Narrow engine and year coverage
- Gain range is only a claim
Performance notes
The twin bore decides how much air reaches the intake at wide-open throttle, while the machined casting governs how well the flange seats. The horsepower range is the maker's claim and depends on the vehicle, with no measured data in the listing.
Specifications
| Brand | BBK Performance |
|---|---|
| Model | 1537 |
| Dimensions & fit | |
| Bore size | Twin 52 mm |
| Dimensions | 9 x 6 x 4 inches |
| Item weight | 4 pounds |
| Power & efficiency | |
| Claimed gain | 7-12 HP, depends on vehicle and application |
| Construction & materials | |
| Material | CNC machined 356 aluminum castings |
| Compatibility & installation | |
| Fits | GM tuned port 305 and 350, 1985-1992 |
| Other details | |
| Part number | 1537 |
Frequently asked questions
Is the BBK 1537 a universal throttle body?
No. It is listed only for GM 305 and 350 tuned port engines of 1985-1992 and is not described for any other engine.
Which GM engines does the BBK 1537 cover?
The description names 1985-1992 GM tuned port 305 and 350 engines, and the title adds TPI.
What is the BBK 1537 made from?
The description says CNC machined 356 aluminum castings.