Trans-Dapt
Utilizing Trans-Dapt's own Swirl-Torque spacer design, this phenolic spacer cuts down on heat transfer for a denser fuel charge. It is also available in 1- or 2-inch aluminum.
| PN | 2550 |
| Spacer material | Canvas phenolic |
| Spacer style | 4-hole |
| Thickness | 1 inch |
| Spacer flange | 4BBL square-bore 4150, 4500 |
| Gaskets | Included |
| Mounting hardware | Included |
| Spacer finish | Natural |
| Cost | $102 |
Notes: Comes with PCV valve nipple.
Trans-Dapt Performance Products
562.921.0404
tdperformance.com
JEGS High Performance
These Edge spacers are CNC-machined from a polycarbonate plastic, which reduces heat transfer and helps keep incoming fuel cooler. They're available in three heights. Also, try this spacer out with a 2.035-inch bore opening for 4500 Dominator carburetors.
| PN | 15420 |
| Spacer material | Polycarbonate |
| Spacer style | 4-hole |
| Thickness | 1 inch |
| Spacer flange | 4BBL square-bore 4150 |
| Gaskets | Included |
| Mounting hardware | Included |
| Spacer finish | Natural |
| Cost | $85 |
Notes: 1.750-inch bore size. Can withstand heat up to 400 F. Will not work on stock manifolds with heat crossover.
Jegs High Performance
800.345.4545
jegs.com
Summit Racing
Plastic not only cuts down on weight, but it also serves as a heat barrier. Get these Summit spacers in 1/2-, 1-, or 2-inch configurations with your choice of cast aluminum or phenolic and either the open or four-hole design. Quadrajet spacers are also available for throttle-body applications.
| PN | G1412 |
| Spacer material | Polycarbonate |
| Spacer style | 4-hole, ported |
| Thickness | 1 inch |
| Spacer flange | 4BBL square-bore 4150 |
| Gaskets | Included |
| Mounting hardware | Included |
| Spacer finish | Black |
| Cost | $15 |
Notes: Also help with linkage clearance when using custom throttle setups.
Summit Racing
800.230.3030
summitracing.com
High Velocity Heads
Super-suckers are constructed out of solid billet, and these pieces would crown any engine build. This version is a lightweight 2-inch design, utilizing a four-hole tapered design. The coolest part? This spacer will convert your 4500 carburetor so that you can plant it on any 4150 intake manifold. That's right; it's an adapter and spacer all in one.
| PN | SS4500/4150-2 |
| Spacer material | Billet aluminum |
| Spacer style | 4-hole tapered |
| Thickness | 2-inch |
| Spacer flange | 4500 to 4150 manifold |
| Gaskets | Not included |
| Mounting hardware | Not included |
| Spacer finish | Natural |
| Cost | $150 |
Notes: This version is CNC'd to eliminate unnecessary weight, making this spacer extremely light.
High Velocity Heads
865.573.9151
highvelocityheads.com