630cc - Buick Grand National/Regal T-Type 1984-87, GMC Syclone 4.3 1991-93

Name: 630cc - Buick Grand National/Regal T-Type 1984-87, GMC Syclone 4.3 1991-93
Brand: DeatschWerks
SKU: 18U-01-0060-6
Price: 245.4 USD
Availability: InStock
Rating: 4.8 (5 reviews)

630cc - Buick Grand National/Regal T-Type 1984-87, GMC Syclone 4.3 1991-93 - Main image

630cc - Buick Grand National/Regal T-Type 1984-87, GMC Syclone 4.3 1991-93 - View 2

$245.4 ~~$409~~ In stock

Category: Fuel Injector

Matched set of 6 630cc/min injectors for Buick Grand National/Regal T-Type 1984-87, Thunderbird Super Coupe 3.8 1989-95, Cougar XR7 3.8 89-90, GMC Syclone 4.3 1991-93, GMC Syclone 4.3 1992-93

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy

If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy

Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy

Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Eli B. ★★★★★ Oct 22, 2026

My Syclone idles noticeably smoother with these 630cc matched injectors, and the set came perfectly flow-matched right out of the box. Took about an hour to swap, and the difference in throttle response is night and day.

Ella ★★★★★ Oct 21, 2026

Swapped these into my 84 Grand National last weekend and the idle smoothed out immediately. The 630cc flow rate is spot on for my mild build, and all six matched within 1% out of the box.

Ruby ★★★★★ Oct 19, 2026

Put these in my Syclone last weekend and the idle smoothed out immediately—no more hesitation off the line. The 630cc flow rate is exactly what my setup needed, and they fired up without any tweaking to the tune.